Smartwatches / Compare

OnePlus Watch 4 vs Samsung Galaxy Watch FE

A

Product A: OnePlus

Watch 4

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B

Product B: Samsung

Galaxy Watch FE

88 of 150 known

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Every value links to where we found it.

Only differences

AOnePlus Watch 4

BSamsung Galaxy Watch FE

General

6 of 10 differ

Series

Watch2Maker product pageoneplus.com/global/oneplus-watch-4Read 20 October 2026OnePlus names the product OnePlus Watch 4, in the OnePlus Watch line.

Galaxy Watch1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Product name Galaxy Watch FE in the Samsung Galaxy Watch line.

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

OPWWE2616Press articlegadgetsandwearables.com/2026/04/16/oneplus-watch-4Read 20 October 2026Leaked final retail box with the product name and model number OPWWE261, matching earlier certification listings. The importer data on the box names the UK, the EU and Poland. OnePlus does not list the model number on its own pages. The OnePlus UK PSTI page lists the Watch Lite as OPWWE262 and has no Watch 4 row.

SM-R861, SM-R8665Press articlesammobile.com/news/galaxy-watch-fe-bluetooth-sigRead 13 October 2026The listing names SM-R861, SM-R866F, SM-R866N and SM-R866U. SM-R866F is the international LTE model, SM-R866N is for South Korea and SM-R866U is for the US. SM-R866 is stored for the LTE family.

GTIN / EAN

Not available

Not available

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

22 April 20263Spec databasegsmarena.com/oneplus_watch_4-14622.phpRead 20 October 2026Launch: announced 2026, April 22.4Press articlegadgetsandwearables.com/2026/04/22/oneplus-watch-4-buyRead 20 October 2026Gadgets & Wearables, 22 April 2026: the watch is official and already listed on the OnePlus website. No price was given.

13 June 20242Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Samsung Global Newsroom release of 13 June 2024.

Status

Available3Spec databasegsmarena.com/oneplus_watch_4-14622.phpRead 20 October 2026Launch: Available. Released 2026, April.

Not available

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

OnePlus Watch 310Reviewnotebookcheck.net/OnePlus-Watch-4-New-Wear-OS-smartwatch-detailed-before-global-release.1275026.0.htmlRead 23 October 2026Notebookcheck's preview says the OnePlus Watch 4 is replacing the OnePlus Watch 3.

Not available

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

Not available

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

Not available

$199.996Press articletomsguide.com/wellness/smartwatches/samsung-galaxy-watch-feRead 13 October 2026Bluetooth model $199.99 from 24 June 2024. LTE model $249.99, arriving later in the year. Android Central reports the same prices. US prices exclude sales tax.

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

Not available

€2197Press articlegiga.de/news/samsung-lueftet-das-geheimnis-neue-galaxy-watch-ist-offiziellRead 13 October 2026Launch article of 14 June 2024: Bluetooth 219 EUR and Bluetooth + LTE 269 EUR. German consumer prices with VAT.

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

Not available

Not available

ColoursiThe maker's own colour names

Midnight Titanium, Evergreen Titanium1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Design and Material: Midnight Titanium with a Fluororubber strap and Evergreen Titanium with a Mix-Fluororubber strap.

Black, Pink Gold, Silver2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Black, Pink Gold and Silver. Colour availability varies by market.

Segment

Smartwatch2Maker product pageoneplus.com/global/oneplus-watch-4Read 20 October 2026The Overview presents a general smartwatch with sports and wellness modes. It has no outdoor, dive or sport-only positioning.

Smartwatch2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Presented as a new addition to the Samsung smartwatch lineup.

OS updates promisediYears of explicitly promised OS updates. A security-only support period does not establish an OS-upgrade promise.

Not available

Not available

Security updates untiliExact end date published for security-update support of this model. Do not calculate it from a stated number of years. A security-only period does not promise OS upgrades.

Not available

Not available

Case

7 of 8 differ

Case sizeiMarketed case-size options. The marketed size can differ from physical case height, such as ceramic editions. Base dimensions describe the smallest base-material case.

47mm7Reviewsmartzone.de/oneplus-watch-4-im-testRead 20 October 2026Review: only the 47 mm variant is on sale. The maker prints 47.4 mm and does not name a marketed size.

40mm2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Available in a size of 40 mm.

Case shape

Round4Press articlegadgetsandwearables.com/2026/04/22/oneplus-watch-4-buyRead 20 October 2026The article describes a premium watch with a round screen.

Round1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Round case and round 396 x 396 display on the product images and user guide.

Case materialiMaterial of the housing body, not just the bezel. Use Mixed when the maker describes a mixture of housing/frame materials. Read the published-material field for the parts and proportions.

Titanium1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Design and Material, Case: Titanium alloy. The Overview calls it an all-titanium watch body.

Aluminium2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: Aluminum case.

Case material (as published)

Titanium alloy1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Design and Material, Case: Titanium alloy.

Aluminum case2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: Aluminum case. Retailers call it Armor Aluminum, which Samsung does not state here.

BackiMaterial of the back of the smallest base-material case. Other materials or regional editions can differ. See source notes.

PA with fiberglass1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Design and Material, Bottom case: PA with fiberglass.

Not available

Case dimensionsiPhysical case height, width and thickness. The source note states exclusions such as the heart-rate sensor protrusion.

Height47.4Width47.4Thickness11mm(1.9 × 1.9 × 0.4 in)1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Size and Weight, Dimensions: 47.4 x 47.4 x 11.0 mm. The page does not say whether the sensor area is included. The Overview text calls the 11 mm a diameter, which is the thickness.

Height39.3Width40.4Thickness9.8mm(1.5 × 1.6 × 0.4 in)1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Body Dimension (HxWxD, mm) 39.3 x 40.4 x 9.8. The global release footnote says measured without health sensors.2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: 39.3 x 40.4 x 9.8mm, footnote 18 measured without health sensors.

Weight (case only)iWatch body without a strap. An unqualified published weight must not be assumed to exclude the strap.

43g(1.5 oz)1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Size and Weight: main part about 43 g without strap.

26.6g(0.9 oz)1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Body Weight 26.6 g. The global release footnote says measured without band. The US launch release table lists 25.9 g, which the global release and Samsung spec pages contradict.2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: 26.6g, footnote 19 measured without band.

Weight with strapiWatch with the stated strap attached. Strap material and case size belong in the source note. Reviewer measurements belong in measured fields.

68g(2.4 oz)1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Size and Weight: the whole machine is about 68 g with wrist strap.

Not available

Durability

3 of 8 differ

Water resistanceiStatic water-pressure rating in atmospheres. It is not a safe swimming or diving depth. Diving limits are listed separately.

5ATM1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Durability: 5ATM, IP69, IP68.

5ATM1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Durability 5 ATM.

Water resistance standard

Not available

ISO 22810:20104Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Maintaining water and dust resistance: 5ATM tested by submerging in 50 m of fresh water for 10 minutes to meet ISO 22810:2010. IPX8 at 1.5 m for 30 minutes and IP6X under IEC 60529.

Dust and water rating

IP68, IP691Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Durability: 5ATM, IP69, IP68. Overview footnote 4: IP68 and IP69 under GB/T 4208-2017, tested at 1.5 m for 30 minutes and with high-temperature, high-pressure water jets. Not a rating for saltwater use or beach use.

IP682Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table lists IP68. Footnote 23: IP68 against dust and fresh water to a maximum of 1.5 meters for up to 30 minutes. The user guide words it as IPX8 and IP6X.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026The guide states IPX8 and IP6X. The release table states IP68, which is the stored value.

Dive rating

Not available

Not available

Max dive depthiMaker-rated depth for the stated diving use, not a conversion from the water-resistance pressure rating.

Not available

Not available

MIL-STD-810iMaker claim that the watch was tested against specified MIL-STD-810 methods. It is not a guarantee for every military-standard test.

Yes1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Durability: Military-grade certification MIL-STD-810H. Overview footnote 3: tested and certified for 16 items.2Maker product pageoneplus.com/global/oneplus-watch-4Read 20 October 2026Overview: built to MIL-STD-810H military-grade standards.

Yes2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: Durability 5ATM + IP68 / MIL-STD-810H. The US launch release table says MIL-STD-810G. Both mean a MIL-STD-810 claim. Samsung publishes no test list.

MIL-STD-810 tests

Altitude, High temperature, Low temperature, Temperature shock, Solar radiation, Rain, Damp heat, Salt spray, Sand and dust, Immersion, Vibration, Shock, Temperature-humidity-altitude, Fluid contamination, Acidic atmosphere, Freezing rain2Maker product pageoneplus.com/global/oneplus-watch-4Read 20 October 2026Overview disclaimer 3 lists 16 items: altitude, high temperature, low temperature, temperature shock, solar radiation, rain, damp heat, salt spray, sand dust, immersion, vibration, shock, temperature-humidity-altitude, fluid contamination, acidic atmosphere and freezing rain.

Not available

Operating temperatureiPublished operating range. Source notes identify on-wrist limits and other operating conditions. Storage or charging limits are excluded.

Min0Max35°C1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Durability: the product can operate normally within an ambient temperature range of 0 to 35 degrees, at 5 to 95 percent relative humidity without condensation. Military test extremes and charging limits are separate.

Min0Max35°C4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Health and Safety: the device can be used at an ambient temperature of 0 to 35 C. Storage is -20 to 50 C.

Display

7 of 14 differ

Display type

LTPO OLED1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Display, Screen: LTPO OLED flexible display.

OLED1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 20262Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: Super AMOLED.

Display type (as published)

LTPO OLED flexible display1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026

Super AMOLED1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Super AMOLED.

Screen sizeiPublished active display diagonal for a rectangular display, or diameter for a round display. Do not calculate it from pixels or display area.

1.5in(3.8 cm)3Spec databasegsmarena.com/oneplus_watch_4-14622.phpRead 20 October 2026Display, Size: 1.5 inches. This fits 466 pixels at 310 ppi.

1.2in(3 cm)2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: 1.2-inch, 396x396, Super AMOLED, Full Color Always On Display. The India page lists the main display as 3.04 cm.

Resolution

466 × 466px1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Display, Resolution: 466 x 466 pixels.

396 × 396px1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: 396 x 396. Colour depth 16M.2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: 396x396.

Pixel densityiPublished pixel density. A rectangular diagonal formula must not be applied to a round display.

310ppi1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Display, PPI: 310 PPI. One reviewer prints 439 ppi, which does not fit 466 pixels on a 1.5 inch display.

Not available

Display area

Not available

Not available

Touchscreen

Yes2Maker product pageoneplus.com/global/oneplus-watch-4Read 20 October 2026Overview: wet-hand touch control.

Yes4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026The screen supports tapping and the Home screen is controlled by touch.

Max refresh rateiHighest published display refresh rate in active operation.

Not available

Not available

Min refresh rateiLowest published display refresh rate, usually in always-on mode. It is not the active-use minimum unless stated.

Not available

Not available

Peak brightnessiMaker peak-brightness claim. It may apply to a small area or bright ambient light. Full-screen limits and battery/temperature conditions belong in source notes.

3,000nits1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Brightness: default maximum 600 nits typical, 1500 nits typical when activated in strong sunlight, and a peak of 3000 nits only in the official self-developed sports mode in strong sunlight. The stored 3000 nits is that conditional peak, not a full-screen or default figure.

Not available

Minimum brightness

Not available

Not available

Always-on display

Yes2Maker product pageoneplus.com/global/oneplus-watch-4Read 20 October 2026Disclaimers 5 and 6 treat AOD as a setting that is off in the 5 day smart mode figure.

Yes2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: Full Color Always On Display.

Display cover

Sapphire1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Display, Cover glass: Sapphire Crystal.

Sapphire1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026

Display cover (as published)

Sapphire Crystal1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026

Sapphire Crystal glass1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Page: Sapphire crystal glass withstands scratches and drops.

Platform

12 of 15 differ

Platform

Wear OS1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Operating System: Android/Wear OS version Wear OS 6.0. One database says Wear OS 7.0, which the maker page does not.

Wear OS1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 20262Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: OS Wear OS Powered by Samsung.

OS at launch

Wear OS 6.01Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Operating System: Wear OS 6.0 with the OxygenOS Watch 8 watch version.

Wear OS 48Spec databasegsmarena.com/samsung_galaxy_watch_fe-13112.phpRead 13 October 2026Spec page: Wear OS 4. The Mezha review says Wear OS 4 with One UI 5 Watch.

Software

OxygenOS Watch 81Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Operating System, Watch version: OxygenOS Watch 8.

One UI 5 Watch2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: UI One UI 5 Watch.

Latest OS

Not available

Wear OS 6 (One UI 8 Watch)8Spec databasegsmarena.com/samsung_galaxy_watch_fe-13112.phpRead 13 October 2026Spec page: upgradable to Wear OS 6.0 with One UI Watch 8. A spec database claim. The date of access dates it.

Works with

Android2Maker product pageoneplus.com/global/oneplus-watch-4Read 20 October 2026Disclaimer 5: pairing with the OHealth app, Android 9.0 and above with GMS 23.45.23 and above. iOS and Android (Go edition) are not supported.

Android2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table lists Android phones only.

Phone requirement

Android 9.0 or later with Google Mobile Services 23.45.23 or later and the OHealth app. iOS and Android Go are not supported.2Maker product pageoneplus.com/global/oneplus-watch-4Read 20 October 2026Disclaimer 5, shortened.

Android 11.0 or higher with more than 1.5 GB of memory. The phone needs Google Mobile Services. Not compatible with Android Go edition.2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: Android 11.0 or higher and with more than 1.5GB of memory. Footnote 21: works with phones running the latest Android, excluding Go edition and phones without Google Play Store. Footnote 24: activation needs a phone that supports Google Mobile Services.

App store

Yes7Reviewsmartzone.de/oneplus-watch-4-im-testRead 20 October 2026Review: Wear OS gives access to the Google Play Store.9Reviewbasic-tutorials.com/reviews/mobile-device-reviews/oneplus-watch-4-reviewRead 20 October 2026Review: the Play Store with watch apps is available.

Yes4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Play Store app on the watch, with a Google Account registered.

Voice assistants

Gemini, Google Assistant1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Voice assistant: Gemini/Google Assistant.

Bixby2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Footnote 21 describes Wear OS Powered by Samsung. The user guide names Bixby as the voice assistant on the Home button.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Press and hold the Home button to start Bixby.

Chipset

Qualcomm Snapdragon W51Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Chip and Storage, Processor: Qualcomm Snapdragon W5 Processor and BES 2800. The Overview names a Dual-Engine Architecture.

Exynos W9202Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: Exynos W920 Dual Core 1.18GHz.

Process

4nm3Spec databasegsmarena.com/oneplus_watch_4-14622.phpRead 20 October 2026Platform, Chipset: Qualcomm Snapdragon W5 Gen 1 (4 nm). The BES2800 coprocessor is not this node.

5nm8Spec databasegsmarena.com/samsung_galaxy_watch_fe-13112.phpRead 13 October 2026Spec page: Exynos W920 (5 nm).9Maker product pagesemiconductor.samsung.com/processor/wearable-processor/exynos-w920Read 13 October 2026Exynos W920 is built on the 5nm EUV process.

CPU cores

Not available

29Maker product pagesemiconductor.samsung.com/processor/wearable-processor/exynos-w920Read 13 October 2026Dual-core Arm Cortex-A55 CPU.

CPU configuration

AOnePlus Watch 4

Not available

BSamsung Galaxy Watch FE

Count	Core	Max clock (GHz)
2	Cortex-A55	1.18

Source8Spec databasegsmarena.com/samsung_galaxy_watch_fe-13112.phpRead 13 October 2026Spec page: dual-core 1.18 GHz Cortex-A55. Matches the Samsung release spec table of 1.18GHz dual core.9Maker product pagesemiconductor.samsung.com/processor/wearable-processor/exynos-w920Read 13 October 2026Dual-core Arm Cortex-A55 CPU running at up to 1.18GHz. The page says it is no longer available as of 31 July 2025.

Max CPU clock

Not available

1.18GHz=CalculatedFrom CPU configuration

GPU

Not available

Arm Mali-G688Spec databasegsmarena.com/samsung_galaxy_watch_fe-13112.phpRead 13 October 2026Spec page: Mali-G68.9Maker product pagesemiconductor.samsung.com/processor/wearable-processor/exynos-w920Read 13 October 2026Arm Mali-G68 GPU.

Low-power coprocessor

BES28001Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Chip and Storage: BES 2800 next to the Snapdragon W5. The Overview calls the pair a dual-engine architecture.

Not available

Memory

2 of 2 differ

RAMiKeep published GB values as stated. Convert a source explicitly labelled MB using 1000 MB per GB and preserve its original figure and unit in the note. Do not assume MB means MiB. Convert explicit MiB or GiB to decimal GB through their byte definitions, recording the conversion in the note. This normalization does not establish an exact physical byte count.

2GB1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Chip and Storage, Storage: RAM 2GB.

1.5GB1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Memory 1.5 GB.

StorageiTotal built-in storage the maker states, in decimal GB. Space available to the user is lower and goes in the source note. A figure the maker gives only as available space is not stored.

32GB1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Chip and Storage, Storage: ROM 32GB. Total storage, user space is not stated.

16GB1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Storage 16 GB, with 7.6 GB available to the user.

Health sensors

4 of 8 differ

Heart rate sensor

Optical heart rate sensor1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Sensor: optical heart rate sensor. The channel count is not stated.

Samsung BioActive Sensor (Optical Heart Rate + Electrical Heart + Bioelectrical Impedance Analysis)1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications Sensors: Accelerometer, Barometer, Bioelectrical Impedance Analysis Sensor, Electrical Heart Sensor, Gyro Sensor, Geomagnetic Sensor, Light Sensor, Optical Heart Rate Sensor. The global release names them the Samsung BioActive Sensor.

ECG capabilityiElectrical heart sensing hardware with an ECG capability. The ECG app can require an eligible country, age and paired phone.

Yes2Maker product pageoneplus.com/global/oneplus-watch-4Read 20 October 2026Disclaimer 8: the activation time of the ECG function in the 60s Wellness Overview depends on the progress of local ECG function certification and registration. The sensor list on the Specs page names no separate electrical sensor.7Reviewsmartzone.de/oneplus-watch-4-im-testRead 20 October 2026Review: ECG is listed as a measurement and is enabled in Germany. The review sample was tested in Germany. Another review says the ECG is part of the 60 second check and is not an independent app.

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Page text: if irregularities are detected the watch prompts a detailed ECG examination. Electrical Heart Sensor is listed. Availability of ECG varies by country.2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Release: users can monitor ECG. ECG is only available in select markets.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Samsung Health Monitor section: Starting to measure ECG.

Blood oxygen sensingiBlood-oxygen sensing capability. App availability and medical status vary by market.

Yes1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Sensor: optical blood oxygen sensor. Health and Workout: manual SpO2, all-day SpO2 tracking and low SpO2 indicators.

Yes4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Samsung Health, Blood oxygen: tap Measure to measure the blood oxygen level.

Skin temperature sensingiA sensor or supported function that measures skin temperature. It is not a core-body thermometer.

Yes1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Sensor: wrist temperature sensor. Health and Workout: wrist temperature monitoring supported.

No11Reviewmezha.ua/en/reviews/galaxy-watch-fe-an-affordable-smartwatch-on-wear-osRead 13 October 2026Review: the difference from older Samsung smartwatches is the absence of a temperature sensor. Samsung's complete sensor list has no temperature sensor. GSMArena lists skin temperature, which the maker list does not support.

Blood pressure featureiPublished blood-pressure feature category. Hypertension notifications are not numerical blood-pressure readings.

Not available

Calibrated with a cuff2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Release: Blood Pressure feature only in select markets. Calibrate every four weeks with a traditional blood pressure cuff. It cannot diagnose hypertension. The US launch release does not name blood pressure.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Samsung Health Monitor section: calibrate and measure blood pressure. The guide names a blood pressure manometer for calibration.

Body composition sensor

Not available

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 20264Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Samsung Health Body composition section.

Skin conductance (EDA)

Not available

Not available

Medical clearancesiNamed regulatory clearances and their jurisdiction. General water resistance or an ECG sensor does not establish medical clearance.

Not available

Not available

Motion and environment sensors

0 of 9 differ

Accelerometer

Yes1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026

Accelerometer range

Not available

Not available

Gyroscope

Yes1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026

Barometric altimeter

Yes1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Sensor: air pressure sensor.

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026

Compass

Yes1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Sensor: geomagnetic sensor.

Yes4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026A Compass app is listed. The India page lists a geomagnetic sensor.

Ambient light sensor

Yes1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026

Depth gauge

Not available

Not available

Depth gauge rangeiPublished measurement range of the depth gauge, distinct from maximum diving depth and water-pressure resistance.

Not available

Not available

Water temperature sensor

Not available

Not available

Health and fitness

2 of 5 differ

Health featuresiSupported health functions with country, phone and subscription restrictions in the source notes. Upcoming functions are not counted as available.

Continuous heart rate, Heart rate alerts, Blood oxygen app, Sleep tracking, Stress tracking, Cycle tracking1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Health and Workout: heart rate monitoring with high and low alerts, resting heart rate, sleep quality assessment, manual and all-day SpO2 and Cycle Tracker. Stress tracking is from the review sources. The 60s Wellness Overview and the ECG function depend on local certification and are not stored as an ECG app.7Reviewsmartzone.de/oneplus-watch-4-im-testRead 20 October 2026Review lists pulse, SpO2, skin temperature, sleep, stress and altitude as measured values. ECG is enabled in Germany.

Heart rate alerts, Irregular rhythm notifications, ECG app, Blood oxygen app, Sleep tracking, Sleep stages, Stress tracking, Cycle tracking, Body composition1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Page: heart rate alerts for a heart rate that is too high or too low, an ECG prompt on irregularities, and body composition. Footnote: Irregular Heart Rhythm Notification availability varies by country.2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Release: HR Alert, Irregular Heart Rhythm Notification in select markets, ECG and blood pressure in select markets, sleep features with sleep coaching, and Body Composition. All are general wellness features. Availability varies by market.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Sleep: four stages Awake, REM, Light and Deep. Also Stress, Cycle tracking, Heart rate alert and Body composition sections.

Fitness featuresiSupported workout functions. A sport-profile name alone does not prove advanced metrics such as running power or running dynamics. Trackback follows the recorded route back to the start. A compass arrow that points straight to the start does not count.

Automatic workout detection, Recovery advice, Running dynamics, Running power, Pool swim1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Health and Workout: 6 types of automatic recognition (running, walk, cycling, swimming, rowing machine, elliptical machine), recovery time, indoor swimming as a professional mode, and running footnote 11 naming vertical ratio and running power data. Open water swimming is announced for a later OTA update and is not stored. Aerobic training effect and cardiopulmonary capacity are listed but are not stored as VO2 max.2Maker product pageoneplus.com/global/oneplus-watch-4Read 20 October 2026Disclaimer 10: professional sport mode for 11 sports including running, skiing, tennis, badminton, indoor swimming, jump rope, hiking, walking, cycling, elliptical and rowing. Disclaimer 11: running data such as vertical ratio and running power are not available in indoor runs, which means they exist for outdoor runs. A pacer function and lactate threshold monitoring are named as advanced running features.9Reviewbasic-tutorials.com/reviews/mobile-device-reviews/oneplus-watch-4-reviewRead 20 October 2026Review: the professional running mode gives step frequency, vertical oscillation, ground contact time and cadence. It also lists 11 professional sports modes and a pace assistant.

Automatic workout detection, Pool swim, Open water swim1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Page: the watch automatically recognizes and logs running, walking and biking. Footnote: auto detect is available for certain workouts.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Exercise lists Pool swim and Open water swim. Auto detect workouts records exercise type, duration and calories automatically.

Sport profilesiPublished count of distinct sport/activity profiles. A claim such as 180+ is not an exact integer count.

Not available

Not available

Dive modesiActual supported dive modes. Water resistance or a depth app alone does not establish decompression-capable scuba support.

Not available

Not available

External sensorsiTypes of external workout sensors the watch can pair with. GPS reception, phone data and built-in sensors do not qualify.

Not available

Not available

Safety

1 of 6 differ

Fall detectioniAutomatic fall detection. Incident detection restricted to recorded workouts is not counted as general fall detection.

Yes1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Health and Workout, Emergency Rescue: Fall Detection. The page does not say who is notified.

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Page: Fall Detection sends an SOS when it detects a fall. Footnote: the Detect falls feature must be enabled in the Galaxy Wearable app.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Requesting an SOS when you are hurt from a fall: Hard fall detection is switched on in the Galaxy Wearable app.

Car crash detection

Not available

Not available

Emergency SOSiA manual emergency alert to emergency services or preset contacts. Source notes identify the recipient, paired-phone requirement and country limits. Satellite is listed separately.

Not available

Yes4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Sending an SOS: in an emergency press the Home button five times to make an emergency call and send an SOS message with the location. Needs set-up in the Galaxy Wearable app.

Emergency sireniPublished or measured siren sound level in decibels. Audible distance alone does not establish this value. Measurement distance belongs in source notes.

Not available

Not available

Live location sharingiShares live location during supported use. A paired phone or data subscription may be required.

Not available

Not available

Dedicated LED flashlightiA dedicated hardware LED flashlight. Lighting the display white is not counted.

Not available

Not available

Positioning

2 of 3 differ

PositioningiPublished satellite systems and signal bands. Do not infer bands from dual-frequency support alone.

GPS (L1 + L5), BeiDou, Galileo, GLONASS, QZSS1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026GNSS: Dual band L1+L5: Beidou, GPS, Galileo, GLONASS, QZSS. The band applies to the group as printed.

GPS, GLONASS, BeiDou, Galileo1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: GPS, Glonass, Beidou, Galileo. Signal bands are not published.

Dual-band GNSSiMaker-stated dual-frequency satellite reception. Supported constellations and signal bands are listed separately.

Yes1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026GNSS: Dual band L1+L5.

Not available

Offline mapsiMap data stored on the watch and usable without live phone data. GPX routes or breadcrumb tracks alone are not offline maps.

Not available

Not available

Connectivity

5 of 15 differ

BluetoothiPublished Bluetooth support for this model. The version is recorded separately. Unknown version does not mean the radio is absent.

Yes1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications list a Bluetooth version and profiles.

Bluetooth version

5.21Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Bluetooth: Bluetooth 5.2.

5.31Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Bluetooth v5.3 with A2DP, AVRCP, HFP and HSP profiles. The US launch release table lists 5.0, which the global release, the Samsung spec pages and the Bluetooth SIG listing contradict.2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: Bluetooth 5.3.5Press articlesammobile.com/news/galaxy-watch-fe-bluetooth-sigRead 13 October 2026Bluetooth SIG listing reported on 4 June 2024: Bluetooth 5.3.

Wi-FiiPublished Wi-Fi support for this model. The standard and bands are recorded separately. Unknown standard does not mean Wi-Fi is absent.

Yes1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026

Wi-Fi standard

Not available

Wi-Fi 41Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Wi-Fi 802.11a/b/g/n 2.4GHz+5GHz, so Wi-Fi 4 on two bands.

Wi-Fi bands

2.4 GHz, 5 GHz1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Wi-Fi: WLAN 2.4G/5G. The standard is not stated.

2.4 GHz, 5 GHz1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026

CellulariTrue when a cellular edition is sold. A variant row states whether that individual model has cellular hardware.

No1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026eSIM: Unsupported. No LTE model is listed.

Yes2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: LTE (footnote 22: LTE connectivity only available in LTE models).

Network

Not available

LTE2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: LTE.

4G bandsiPublished LTE bands for the stated regional cellular model. Do not transfer bands to another region or Wi-Fi-only model.

Not available

Not available

5G bandsiPublished 5G NR bands for the stated regional cellular model. RedCap support does not establish conventional full-bandwidth phone 5G.

Not available

Not available

NFCiSome regions sell an NFC edition, so it is per variant.

Yes1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026NFC: Supported.

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026

Contactless payments

Yes1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026

Yes2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Release: supports Samsung Wallet for payments. Availability varies by market and paired phone.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Samsung Wallet and Samsung Pay: register cards to make payments. Region and phone restrictions apply.

Payment services

Google Wallet1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Mobile Payment: Google Wallet.

Samsung Wallet2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Samsung Wallet.

Ultra-wideband

Not available

Not available

Satellite

Not available

Not available

ANT+

Not available

Not available

Audio

2 of 4 differ

Speaker

Yes3Spec databasegsmarena.com/oneplus_watch_4-14622.phpRead 20 October 2026Sound, Loudspeaker: Yes. Smartwatch review sources confirm a speaker.

Yes4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Device layout lists a speaker and a microphone.8Spec databasegsmarena.com/samsung_galaxy_watch_fe-13112.phpRead 13 October 2026Spec page: loudspeaker yes.

Microphones

18Reviewprofesionalreview.com/2026/06/01/oneplus-watch-4-review/ampRead 20 October 2026Review of the underside: a microphone on the right side and a speaker opening on the left side, with four charging contacts. The review names one microphone.

Not available

Calls on the watchiVoice-call capability of the marketed model, including sold cellular editions. Variant radio capability and paired-phone requirements still apply.

Phone only7Reviewsmartzone.de/oneplus-watch-4-im-testRead 20 October 2026Review: you can only make calls when the phone is nearby. There is no eSIM.

Cellular or phone2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: LTE connectivity only available in LTE models. The Bluetooth model makes calls through the paired phone with the HFP profile on the India page.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Phone app: make and receive calls on the watch.

Music on the watchiPlays audio stored on the watch. Remote control of phone playback or streaming alone does not qualify.

Yes7Reviewsmartzone.de/oneplus-watch-4-im-testRead 20 October 2026Review: music storage on the 32 GB and native offline playback with Spotify from the Play Store.

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Audio Playing Format MP3, M4A, 3GA, AAC, OGG, OGA, WAV, AMR, AWB, with 16 GB of storage. The user guide describes managing audio files saved on the watch.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Music app and Managing audio files saved on your Watch.

Controls

5 of 5 differ

ButtonsiPhysical controls used to operate the watch, excluding the rotating crown and strap-release buttons. A clickable rotating crown is counted only in Crown.

17Reviewsmartzone.de/oneplus-watch-4-im-testRead 20 October 2026Review: the rotating knob is not counted. One extra Workout button. The Spanish review describes an upper wheel and a lower flat button.8Reviewprofesionalreview.com/2026/06/01/oneplus-watch-4-review/ampRead 20 October 2026Review: two controls on the right side. An upper wheel and a lower flat button.

24Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Device layout lists a Home button and a Back button. Both double as electrical biosensors.

Named operating buttonsiNames of operating buttons, excluding the crown and strap-release controls.

Workout button7Reviewsmartzone.de/oneplus-watch-4-im-testRead 20 October 2026Review: the additional Workout button. The Spanish review says the lower button opens the sport list.

Home button, Back button4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Device layout: Home button (Power button) and Back button.

CrowniA crown that rotates to control the interface. A round push button that does not rotate is not a crown.

Rotating7Reviewsmartzone.de/oneplus-watch-4-im-testRead 20 October 2026Review: rotating and pressable knob plus an extra workout button. The Spanish review also describes a metal wheel that turns and presses. Haptic feedback is not stated.8Reviewprofesionalreview.com/2026/06/01/oneplus-watch-4-review/ampRead 20 October 2026Review: the upper right button is a metal wheel that turns and presses.

None4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Device layout lists the Home and Back buttons and a touch bezel. It does not list a crown.

Rotating bezeliPhysical rotation or touch gestures around the display edge. A fixed decorative bezel is None.

Not available

Touch4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Touch bezel section: the watch has a touch bezel around the screen. Swipe it clockwise or counterclockwise to scroll.

Gestures

Raise wrist to wake7Reviewsmartzone.de/oneplus-watch-4-im-testRead 20 October 2026Review: the display wakes when the wrist is turned.

Not available

Battery and charging

7 of 13 differ

Battery capacityiPublished battery capacity for the stated case size. Rated and typical capacity are distinguished in source notes.

646mAh1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Battery Life, Battery capacity: 646 mAh typical and 632 mAh rated. The typical figure is stored because it is the number used in the maker's and reviewers' headline.

247mAh1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Battery capacity 247 mAh typical, not removable.2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: 247mAh (typical).

Claimed battery lifeiMaker endurance claims with distinct operating modes and case sizes. With solar describes augmentation of that estimate, not hardware capability. Use false for ordinary claims without solar augmentation, true for explicitly solar-aided claims, and omit it when solar qualification is unclear. Source notes state AOD, GNSS, music and solar conditions. Do not create a normal-use row from an AOD-only claim. Low power denotes the maker battery-saver mode. Keep its typical, light-use and always-on claims separate from standard-mode claims. GPS power saving identifies an intermediate reduced-accuracy GNSS saving preset. Source notes retain the maker's preset name and published conditions. Max battery GPS is the distinct maximum-saving claim. When the maker has only one GPS saving preset, it is GPS power saving.

AOnePlus Watch 4

Mode	With solar	Hours (h)
Smartwatch	No	120
Heavy use	No	72
Low power	No	384

Source1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Battery Life: 5 days in smart mode, 3 days for heavy use and 16 days in power saver mode. Days are stored as hours. Overview footnote 6 says the 5 days use the official watch face, AOD off, default health monitoring, 220 wrist raises, 130 messages, 20 minutes of screen use, 30 minutes of outdoor running and 15 minutes of music per day. Footnote 7 says the 16 days use all-day Bluetooth, 90 minutes of outdoor workouts a week, 180 wrist raises and 180 messages a day, and 6 hours of sleep detection.2Maker product pageoneplus.com/global/oneplus-watch-4Read 20 October 2026Overview: 5 days in smart mode and 16 days in power-saver mode. Disclaimer 6 gives the 5 day usage case with AOD off. Disclaimer 7 gives the 16 day usage case.

BSamsung Galaxy Watch FE

Mode	With solar	Hours (h)
Smartwatch	No	40

Source1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Specifications: Usage time up to 40 hours with the always-on display off. No other test conditions are stated.

Smartwatch mode (claimed)iMaker normal-use smartwatch claim without solar. A watch with only an explicit AOD-mode claim has no value here. Workloads differ and source notes must be read.

120h=CalculatedFrom Claimed battery life

40h=CalculatedFrom Claimed battery life

AOD battery life (up to)iMaker claimed smartwatch endurance with the always-on display enabled and without solar, for the base case. Source notes preserve workload and case conditions. This is a claim, not a measured test or an AOD-off estimate.

Not available

Not available

GPS mode (claimed)iMaker regular GPS/GNSS activity claim without solar, for the base case. AOD, multi-band, music and power-saving conditions have separate rows when published.

Not available

Not available

Solar chargingiPublished solar charging hardware capability. An ordinary battery estimate without solar augmentation does not prove that the watch lacks solar charging hardware.

Not available

Not available

Charging methodiThe connection at the watch, not the cable end at the USB adapter. A proprietary inductive puck is not Qi unless interoperability is explicitly established.

Not available

Proprietary wireless charger2Press releasenews.samsung.com/global/first-galaxy-watch-fe-empowers-even-more-users-with-samsungs-advanced-health-monitoring-technologyRead 13 October 2026Spec table: WPC-based wireless charging. Not established as generic Qi.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Wireless charger section: the watch has a built-in wireless charging coil. Use the wireless charger supplied with the watch. It cannot be charged properly with some third-party pads when the band is attached.

Charging guidanceiPublished charging requirements, nominal estimates and compatibility guidance. Keep adapter ratings separate from power accepted by the watch.

Not available

Samsung describes WPC-based wireless charging. The user guide says to charge with the supplied wireless charger on a USB power adapter and that some third-party charging pads do not work with the band attached. The adapter rating is not published.4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026Wireless charging section: connect the wireless charger to the USB power adapter and place the watch on it. Use only the wireless charger supplied with the watch. Some third-party charging pads do not charge the watch with the band attached. No adapter rating is given.

Max charging power (watch)iPublished maximum charging power at the watch. Adapter rating or charger input power does not prove the power accepted by the watch.

7.5W1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Battery Life, Max charging power: about 7.5 W. Stored as a maker figure for the watch.

Not available

Fast chargingiAn explicit fast-charging capability claim. A short charging time or high adapter wattage alone does not qualify.

Not available

Not available

Quick charge claimiMaker claim for usage from a short charge. Source notes identify the usage workload, such as normal use or sleep tracking.

Not available

Not available

Charge 0 to 80% (claimed)iMaker claim for charging an empty battery to 80%. Charger and approximate qualifiers belong in source notes.

Not available

Not available

Full charge time (claimed)iMaker advertised nominal full-charge duration. Approximate or theoretical maker estimates are allowed, with their conditions in source notes. Partial-charge intervals do not qualify. Measured 0 to 100% tests have a separate field.

75min1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Battery Life, Max charging time: about 75 minutes. The page does not name the charger or the start level.

Not available

Measured

1 of 4 differ

Peak brightness (measured)iReviewer measurement. Source notes state screen area, mode and ambient light. A small-area peak claim cannot be replaced with a full-screen measurement.

Not available

Not available

Battery life (measured)iReviewer-observed mixed-use endurance. Source notes state case size, AOD, workout use and whether it was a complete discharge. Extrapolation from partial discharge is excluded.

Not available

Not available

Battery tests (measured)iReviewer-observed endurance, with case size and test settings in source notes. Partial-discharge projections are not stored as measured endurance.

AOnePlus Watch 4

Not available

BSamsung Galaxy Watch FE

Test	Hours (h)
Mixed use, always-on	27
Mixed use, always-on display off	39

Source11Reviewmezha.ua/en/reviews/galaxy-watch-fe-an-affordable-smartwatch-on-wear-osRead 13 October 2026Review of the 40 mm model. About 27 hours with the always-on display on and regular heart rate tracking. 39 hours with the always-on display off and a 5 km GPS run added. The reviewer does not state the complete test protocol.

Full charge time (measured)iReviewer measurement from empty to full, not 0-80% or a charge from 5%. Source notes name the charger and case size.

Not available

Not available

Strap

5 of 6 differ

Lug widthiDistance between standard strap attachment lugs, not the decorative width of a proprietary strap. Unknown for custom connectors unless the maker publishes lug width.

22mm7Reviewsmartzone.de/oneplus-watch-4-im-testRead 20 October 2026Review: the supplied strap uses a standard 22 mm attachment, so it is easy to change.

20mm8Spec databasegsmarena.com/samsung_galaxy_watch_fe-13112.phpRead 13 October 2026Standard 20 mm straps.

Quick-release strapiThe supplied strap can be detached through its quick-release mechanism. Compatibility with quick-release replacement straps alone does not qualify.

Not available

Yes1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Page: press the release button on the one-click band to detach the band.

Strap systemiPublished attachment system and compatible case sizes. Proprietary connectors are distinguished from standard spring bars.

Standard 22 mm watchbands7Reviewsmartzone.de/oneplus-watch-4-im-testRead 20 October 2026Review: standard 22 mm attachment.

Standard 20 mm straps with Samsung one-click band release8Spec databasegsmarena.com/samsung_galaxy_watch_fe-13112.phpRead 13 October 2026Spec page: compatible with standard 20mm straps. The Mezha review also says any 20 mm strap fits.

Strap materialiMaterial of the supplied strap for the stated package. Do not substitute material from another band sold separately.

Fluoroelastomer1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Design and Material, Strap: Fluororubber on Midnight Titanium and mixed fluororubber on Evergreen Titanium. Fluororubber is stored as fluoroelastomer.

Not available

Strap

Not available

Not available

Strap sizesiPublished wrist-circumference range for the stated strap or case. Source notes distinguish an overall compatible wrist range from one supplied strap size.

AOnePlus Watch 4

Wrist (min) (mm)	Wrist (max) (mm)
140	210

Source1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026Design and Material, Wrist size: 140 mm-210 mm. This is the range of the supplied strap.

BSamsung Galaxy Watch FE

Not available

Regulatory

0 of 3 differ

FCC ID

Not available

A3LSMR86110Press articledroid-life.comRead 13 October 2026Droid Life article on the FCC filing: model SM-R861, FCC ID A3LSMR861, tested for Bluetooth and Wi-Fi only. The FCC ID for the LTE models is not found.

SAR limb (US)iPublished limb/wrist SAR for the stated base regional model under the US regime. Other case sizes or radio versions can differ. Head or body SAR is excluded.

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SAR limb (EU)iPublished limb/wrist SAR for the stated base regional model under the EU regime. Other case sizes or radio versions can differ. Head or body SAR is excluded.

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Other certifications

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In the box

2 of 2 differ

In the box

Watch body, Charging base, Strap, USB-C charging cable, User Guide & Safety and Warranty Booklet1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026In The Box: watch body, charging base, strap, USB-C charging cable, user guide and safety and warranty booklet.

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Power adapter in boxiA mains/USB power adapter is supplied. A charging cable, inductive puck or charging dock alone does not count.

No1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026In The Box lists a charging base and a USB-C charging cable and no power adapter.

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Links

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Product page

www.oneplus.com/global/oneplus-watch-42Maker product pageoneplus.com/global/oneplus-watch-4Read 20 October 2026OnePlus Watch 4 overview page on the global site.

www.samsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkains1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026Samsung India product page for the Bluetooth 40 mm model. The page lists Launch date 26 September 2024 for India.

Spec sheet

www.oneplus.com/global/oneplus-watch-4/specs1Maker product pageoneplus.com/global/oneplus-watch-4/specsRead 20 October 2026OnePlus Watch 4 Specs page on the global site. The values sit in the page data, grouped as Design and Material, Size and Weight, Display, Brightness, Chip and Storage, Battery Life, Operating System and others.

www.samsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkains1Maker product pagesamsung.com/in/watches/galaxy-watch/galaxy-watch-fe-40mm-black-bluetooth-sm-r861nzkainsRead 13 October 2026

Manual

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org.downloadcenter.samsung.com/downloadfile/ContentsFile.aspx4Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 13 October 2026User guide SM-R861, English (CA), 06/2024, Rev. 1.0 on Samsung Download Center.

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

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Warranty

None of 1 known

Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

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Both are also in the API. Back to all smartwatches.