Smartwatches / Compare

Amazfit Bip Max vs Xiaomi Watch S4

A

Product A: Amazfit

Bip Max

89 of 150 known

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B

Product B: Xiaomi

Watch S4

83 of 150 known

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Every value links to where we found it.

Only differences

AAmazfit Bip Max

BXiaomi Watch S4

General

7 of 10 differ

Series

Bip1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026

Watch S3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Q4 compares the Watch S4 with its predecessor, the Xiaomi Watch S3, in the same Watch S line.

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

A2568, W2568US2N, W2568US3N, W2568US4N, W2568EU1N, W2568EU2N, W2568EU3N1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026US store variant SKUs W2568US2N (Silver), W2568US3N (Dark Blue) and W2568US4N (Carbon Gray). EU part numbers and A2568 come from other sources.4Owner's manualsupport.amazfit.com/en/amazfit_bip_max/imgs/electronic_manual.pdfRead 16 October 2026Basic Parameters: model number A2568.10Retailer pageshopro.lt/582687-smartwatch-bip-max-silver-w2568eu1n-amazfit-enRead 16 October 2026Model W2568EU1N, Silver. W2568EU2N (Dark Blue) is on an Estonian retailer page and W2568EU3N (Carbon Gray) on billiger.de.11Retailer pagebilliger.de/pricelist/5875271782-amazfit-bip-max-carbon-grayRead 16 October 2026Listing: Amazfit Bip Max SmartWatch Carbon Gray, W2568EU3N.12Retailer pagearvutitark.ee/en/smart-devices/smartwatchesactivity-monitors/smartwatch-bip-maxdark-blue-w2568eu2n-amazfit-1631542Read 16 October 2026Product code W2568EU2N for the Dark Blue Bip Max.

M2425W1, BHR9195GL, BHR9197GL, BHR9199GL4Maker spec sheet (PDF)i02.appmifile.com/229_operatorx_operatorx_xm/29/08/2026/0506b1d933bea38854867532d7b1e253.pdfRead 15 October 2026EU Declaration of Conformity for radio equipment model M2425W1, Smart Watch, listed on Xiaomi's declaration page as Xiaomi Watch S4. The 41 mm Watch S4 is M2502W1 and is a separate product. The standards list covers Bluetooth, NFC and GNSS and has no cellular standard.6Maker product pagemi.com/global/service/support/declaration.htmlRead 15 October 2026Declaration page lists Xiaomi Watch S4 M2425W1 with EU DoC and PSTI documents, separate from Watch S4 41mm M2502W1.7Spec databasegsmarena.com/xiaomi_watch_s4-13476.phpRead 15 October 2026Spec page lists models M2424W1 and M2425W1. Only M2425W1 is documented for the global model, so M2424W1 is not stored.11Retailer pageeuronics.ee/en/phones/watches/smart-watches/bhr9195gl/xiaomi-watch-s4-black-smart-watchRead 15 October 2026Retailer product code BHR9195GL for the black Xiaomi Watch S4, 44.5 g, 486 mAh, Bluetooth 5.3, 4G No.13Retailer pagepood.datafox.ee/xiaomi-watch-s4-rainbow-smart-watchRead 15 October 2026Rainbow product code BHR9199GL.14Retailer pageachatmoinscher.com/comparateur-de-prix-Montre-connectee-sportive/montre-intelligente-xiaomi-s4-bhr9197gl-gris-argente-6941812707432.htmlRead 15 October 2026Silver product code BHR9197GL.

GTIN / EAN

6978099570077, 6978099570084, 69780995701522Maker product pagede.amazfit.com/products/bip-maxRead 16 October 2026Store variant barcodes: 6978099570077 (Silver), 6978099570084 (Dark Blue), 6978099570152 (Carbon Gray).10Retailer pageshopro.lt/582687-smartwatch-bip-max-silver-w2568eu1n-amazfit-enRead 16 October 2026EAN 6978099570077 for the silver W2568EU1N. It matches the German store barcode.11Retailer pagebilliger.de/pricelist/5875271782-amazfit-bip-max-carbon-grayRead 16 October 2026EAN 6978099570152 for Carbon Gray.

6941812732403, 6941812707432, 694181271166812Retailer pagepood.datafox.ee/xiaomi-s4-smartwatch-blackRead 15 October 2026Black BHR9195GL, EAN 6941812732403.13Retailer pagepood.datafox.ee/xiaomi-watch-s4-rainbow-smart-watchRead 15 October 2026Rainbow BHR9199GL, EAN 6941812711668.14Retailer pageachatmoinscher.com/comparateur-de-prix-Montre-connectee-sportive/montre-intelligente-xiaomi-s4-bhr9197gl-gris-argente-6941812707432.htmlRead 15 October 2026Silver BHR9197GL, EAN 6941812707432.

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

20 May 20266Press articlesmartworld.it/news/amazfit-bip-max-prezzo-scheda-tecnica.htmlRead 16 October 2026Published 20 May 2026.7Press articlegagadget.com/en/711363-amazfit-bip-max-a-100-sports-watch-with-a-3000-nit-screen-and-offline-mapsRead 16 October 2026Published 20 May 2026.

29 October 20247Spec databasegsmarena.com/xiaomi_watch_s4-13476.phpRead 15 October 2026Spec page: announced and released 29 October 2024 in China. The global model followed in March 2025.

Status

Available1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Store page lists Silver and Carbon Gray in stock and Dark Blue sold out at $99.99 on the access date. Tagged Best Sellers.

Available2Maker product pagemi.com/global/product/xiaomi-watch-s4Read 15 October 2026The global product page is live with specs and a buy link. GSMArena lists it as available.

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

Not available

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

Xiaomi Watch S5 46mm15Reviewgsmarena.com/xiaomi_unveils_smart_band_10_pro_buds_6_sound_play_speaker-news-73032.phpRead 23 October 2026GSMArena says the Xiaomi Watch S5 comes as the successor to the Watch S4.

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

$99.991Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Regular price $99.99 at the US store with no compare-at price. US prices exclude sales tax.7Press articlegagadget.com/en/711363-amazfit-bip-max-a-100-sports-watch-with-a-3000-nit-screen-and-offline-mapsRead 16 October 2026$99.99 in the US.

Not available

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.

€99.92Maker product pagede.amazfit.com/products/bip-maxRead 16 October 2026German store price 99.90 EUR for all colours with no compare-at price. VAT is included. The UK and EU stores show the same figure in their currency.6Press articlesmartworld.it/news/amazfit-bip-max-prezzo-scheda-tecnica.htmlRead 16 October 2026Price 99.90 EUR. Italian report, VAT included.8Reviewtour-magazin.de/en/training/smartwatch-for-under-100-euros-amazfit-bip-max-fitness-motivation-on-the-wristRead 16 October 2026Specification list gives 99.90 EUR. A photo caption says 99.95 EUR. The article is dated 22 May 2026.

€159.9910Press articlefonearena.com/blog/447624/xiaomi-buds-5-pro-watch-s4-electric-scooter-5-max-price-global.htmlRead 15 October 2026Price 159.99 euros for the Watch S4. The article lists no colours and gives no tax treatment. Retail listings put the Rainbow edition at 169.99 euros, which is not a launch price and is not stored.

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

US, EU1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026US store and the German and EU stores.

EU10Press articlefonearena.com/blog/447624/xiaomi-buds-5-pro-watch-s4-electric-scooter-5-max-price-global.htmlRead 15 October 2026Euro price from European announcement coverage. The global launch was at MWC 2025.

ColoursiThe maker's own colour names

Silver, Dark Blue, Carbon Gray1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Spec table: Silver, Dark Blue, Carbon Gray.2Maker product pagede.amazfit.com/products/bip-maxRead 16 October 2026Store variants Silver, Dark Blue and Carbon Gray.

Black, Silver, Rainbow1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026Silver, Rainbow and Black.

Segment

Smartwatch1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026The page sells it as a hybrid-training smartwatch for everyday and gym use.

Smartwatch2Maker product pagemi.com/global/product/xiaomi-watch-s4Read 15 October 2026The page sits under Wearables as the Xiaomi Watch S4 smartwatch with a rotating crown and 150+ sports modes.

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

2 March 20275Maker spec sheet (PDF)i02.appmifile.com/791_operatorx_operatorx_xm/05/03/2026/e12c7be544083cc45f26f933fa49ae28.pdfRead 15 October 2026UK PSTI statement for M2425W1 dated 2025/2/6: the defined support period is until 3/2/2027. Xiaomi's other PSTI statements use month/day/year, such as 11/15/2026 and 2/27/2028, so this reads as 2 March 2027. This is a security-support period, not an OS-upgrade promise.

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.

Not available

47.3mm1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026The maker states 47.3 mm x 47.3 mm x 12.0 mm. The separate 41 mm Watch S4 has its own page and is not included.

Case shape

Rectangular1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Case dimensions 42.76 x 49.58 mm. The Zepp device list gives a square screen shape at 432 x 514.5Maker product pagedocs.zepp.com/docs/reference/related-resources/device-listRead 16 October 2026Amazfit Bip Max row: screen shape Square, 432 x 514, two physical keys.

Round3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Q2: round AMOLED display and 47.3 mm diameter.

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.

Mixed materials1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Technical Specifications > Design > Body Material: Frame: Aluminum Alloy. Case: Plastic. Stored as mixed.

Aluminium1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026Aluminum alloy frame. The bezel is stainless steel according to the support FAQ.3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Q2: middle frame entirely aluminium alloy, bezel stainless steel.

Case material (as published)

Frame: Aluminum alloy. Case: Plastic1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026

Aluminium alloy middle frame with PVD coating and stainless steel bezel3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Q2 and the S3 comparison: aluminium alloy with PVD coating, stainless steel bezel.

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

Not available

Not available

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

Height49.58Width42.76Thickness10.93mm(2 × 1.7 × 0.4 in)1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Case Dimensions 42.76 x 49.58 mm. Thickness 10.93 mm excludes the heart rate sensor and 13.24 mm includes it. The excluded value follows the other Amazfit entries.

Height47.3Width47.3Thickness12mm(1.9 × 1.9 × 0.5 in)1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 202647.3 x 47.3 x 12.0 mm. The maker excludes the strap and protrusions. The FAQ gives 14.13 mm thickness with the heart rate bump.3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Q2: diameter 47.3 mm, thickness 12 mm excluding the deco and heart rate sensor.

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

34.3g(1.2 oz)10Retailer pageshopro.lt/582687-smartwatch-bip-max-silver-w2568eu1n-amazfit-enRead 16 October 2026Data sheet: weight 34.3 g and band weight 18.3 g. Together they equal the maker 52.6 g with strap, so 34.3 g is the watch without strap. A German retailer lists the same two figures.

44.5g(1.6 oz)1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 202644.5 g approx., without the in-box strap.3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Q2: 44.5 +/- 1 g, excluding the strap.

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

52.6g(1.9 oz)1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Weight (including strap): 52.6 g.

Not available

Durability

2 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 pageus.amazfit.com/products/bip-maxRead 16 October 2026Water-Resistance Grade 5 ATM. Note 10: static pressure equal to 50 m. Not for snorkeling, diving or the sauna.4Owner's manualsupport.amazfit.com/en/amazfit_bip_max/imgs/electronic_manual.pdfRead 16 October 2026Basic Parameters: water resistance rating 5 ATM.

5ATM1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 20265 ATM, described as 50 m static pressure. The maker says it is not suitable for hot showers, saunas or diving.3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Q9: 5 ATM, equivalent to 50 m, for pool and shallow-water use and not for diving.

Water resistance standard

ISO 22810:20101Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Note 10: rating according to ISO 22810:2010, tested by SGS.

Not available

Dust and water rating

Not available

Not available

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.

Not available

Not available

MIL-STD-810 tests

Not available

Not available

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

Min0Max45°C4Owner's manualsupport.amazfit.com/en/amazfit_bip_max/imgs/electronic_manual.pdfRead 16 October 2026Basic Parameters: working temperature 0 to 45 C.

Min-10Max45°C9Retailer pageteamplush.by/enRead 15 October 2026Same reseller copy of the manual: working temperature -10 to 45 C.

Display

6 of 14 differ

Display type

OLED1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Display > Material: AMOLED.

OLED1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026Spec row: 1.43-inch AMOLED display. No LTPO is stated.

Display type (as published)

AMOLED1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026

AMOLED1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026Spec row: AMOLED display.

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

2.07in(5.3 cm)1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Display Size 2.07 inch, a diagonal. 432 x 514 pixels at 324 ppi fits that diagonal.

1.43in(3.6 cm)1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 20261.43-inch AMOLED display, 466 x 466 pixels.

Resolution

432 × 514px1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 20265Maker product pagedocs.zepp.com/docs/reference/related-resources/device-listRead 16 October 2026Row: 432 x 514.

466 × 466px1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026

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

324ppi1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026PPI 324 as published.

326ppi1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026Published PPI 326.

Display area

Not available

Not available

Touchscreen

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Touchscreen row: tempered glass with anti-fingerprint coating. The manual lists tap and swipe gestures.3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026

Yes1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026

Max refresh rateiHighest published display refresh rate in active operation.

Not available

60Hz1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 202660 Hz refresh rate. The maker notes it may vary across interfaces.

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 pageus.amazfit.com/products/bip-maxRead 16 October 2026Peak brightness up to 3,000 nits. Note 11: not supported when battery is below 30 percent, and up to 2,000 nits after automatic brightness is enabled.

2,200nits1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026Peak 2200 nits is when only part of the screen lights up. HBM 1500 nits is the full-screen maximum. No reviewer measurement is substituted.

Minimum brightness

Not available

Not available

Always-on display

Yes3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026Always On Display under Settings > Display. It reduces battery life.

Yes2Maker product pagemi.com/global/product/xiaomi-watch-s4Read 15 October 2026Support FAQ has the AOD controls. The overview page announces colour always-on displays.3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Q26: Always-on display supported, with Smart or Scheduled modes.

Display cover

Other glass1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026

Other glass3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Q2: Panda Glass cover. It is not a named Gorilla Glass or sapphire.

Display cover (as published)

Tempered glass + anti-fingerprint coating1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Spec table names the touchscreen cover as tempered glass with an anti-fingerprint coating. No glass brand is named.

Panda Glass3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Q2: Panda Glass.

Platform

6 of 15 differ

Platform

Proprietary5Maker product pagedocs.zepp.com/docs/reference/related-resources/device-listRead 16 October 2026The device runs Zepp OS, the maker own operating system.

Proprietary1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026Operating system: Xiaomi HyperOS 2, Xiaomi's own software. No Wear OS or other third-party watch platform is named.

OS at launch

Zepp OS 5.05Maker product pagedocs.zepp.com/docs/reference/related-resources/device-listRead 16 October 2026Row lists Zepp OS version 5.0. Press says it launched with Zepp OS 5.0.7Press articlegagadget.com/en/711363-amazfit-bip-max-a-100-sports-watch-with-a-3000-nit-screen-and-offline-mapsRead 16 October 2026Runs ZeppOS 5.0.8Reviewtour-magazin.de/en/training/smartwatch-for-under-100-euros-amazfit-bip-max-fitness-motivation-on-the-wristRead 16 October 2026Lists Zepp OS 5.0.

Xiaomi HyperOS 21Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026

Software

Not available

Not available

Latest OS

Zepp OS 5.05Maker product pagedocs.zepp.com/docs/reference/related-resources/device-listRead 16 October 2026The Zepp device list gives Zepp OS version 5.0 for this device on the access date.

Not available

Works with

iOS, Android1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026

Android, iOS1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026Supports Android 8.0 and above, or iOS 14.0 and above.

Phone requirement

Android 7.0 and above, iOS 15.0 and above, with the Zepp app1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Supported Devices: Android 7.0 and above, iOS 15.0 and above. Application: Zepp App.

Android 8.0 or later, or iOS 14.0 or later, with the Mi Fitness app1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026The Mi Fitness app is required for pairing according to the support FAQ.

App store

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026The manual describes mini app download from the app store in the Zepp app.3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026

Not available

Voice assistants

Zepp Flow1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Zepp Flow, select countries and regions. Note 7 lists the languages.

Not available

Chipset

Not available

Not available

Process

Not available

Not available

CPU cores

Not available

Not available

CPU configuration

Not available

Not available

Max CPU clock

Not available

Not available

GPU

Not available

Not available

Low-power coprocessor

Not available

Not available

Memory

1 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.

Not available

Not available

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.

4GB1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Up to 4GB of onboard storage for offline maps. Podcast playback is to follow by software update. Available space is lower and is not published.

Not available

Health sensors

4 of 8 differ

Heart rate sensor

BioTracker 6.0 PPG biometric sensor (5PD + 2LED)1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Sensors > Health: BioTracker 6.0 PPG biometric sensor (5PD + 2LED).

Heart rate sensor (with blood oxygen sensor)1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026Sensors row: heart rate sensor (with blood oxygen sensor). No sensor generation is named.

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

No9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026ECG listed as not supported. The maker sensor list names no electrical sensor.

Not available

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

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 202624-hour and manual blood-oxygen saturation. Not a medical device.

Yes1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026

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

No9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026Skin temperature listed as not supported.

Not available

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

Not available

Not available

Body composition sensor

Not available

Not available

Skin conductance (EDA)

No9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026Galvanic skin response listed as absent.

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

1 of 9 differ

Accelerometer

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026

Yes1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026

Accelerometer range

Not available

Not available

Gyroscope

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Sensors > Movement lists acceleration, gyroscope, ambient light and geomagnetic sensors.

Yes1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026

Barometric altimeter

No1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026The complete Movement sensor list has no barometer.9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026Barometric altimeter listed as absent.

Yes1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026

Compass

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026The geomagnetic sensor is listed and the manual has a Compass app.3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026

Yes1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026Sensors row lists an electronic compass.

Ambient light sensor

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026

Yes1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 20263Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Brightness Auto adjusts to ambient light.

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

3 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, Heart rate variability, Sleep tracking, Sleep stages, Stress tracking, Readiness score, Cycle tracking1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 202624-hour heart rate, blood oxygen and stress, abnormally high and low heart rate reminders, sleep HRV, sleep stages including REM, BioCharge energy monitoring and menstrual cycle tracking. The FAQ says BioCharge shows energy and readiness, so it is stored as readiness score. Not a medical device.3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026BioCharge, sleep stages and sleep score, heart rate alerts, low blood oxygen alerts, stress and menstrual cycle tracking are described.

Continuous heart rate, Blood oxygen app, Sleep tracking, Sleep stages, Stress tracking, Cycle tracking2Maker product pagemi.com/global/product/xiaomi-watch-s4Read 15 October 2026Overview: heart rate, stress, blood oxygen and sleep monitoring, all-day options that need to be switched on. These are not medical features.3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Health pages: all-day heart rate, blood oxygen and stress, sleep stages (deep, light, REM, awake) and the Cycles app.

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, VO2 max, Training load, Recovery advice, Pool swim, Open water swim, Strength rep counting, Interval workouts, Route navigation, Turn-by-turn navigation, Trackback1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Smarter Metrics: VO2 Max (note 5, outdoor running modes only), Training Load and Training Effect. Heart rate recovery. Pool and open water swimming modes. Strength training with recognition of 25 exercises. Interval training on the watch. Offline maps, track navigation and turn-by-turn directions.3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026Navigation pages 21 and 22: track import, track navigation, turn by turn reminders and Backtrack to the start. Automatic workout identification covers walking, running, cycling, pool swimming, elliptical and rowing. Training load, recovery time and VO2 max sit in the workout status pages.

Automatic workout detection, VO2 max, Training load, Running dynamics, Pool swim, Open water swim2Maker product pagemi.com/global/product/xiaomi-watch-s4Read 15 October 2026Overview: running form recognition (vertical ratio, vertical amplitude, ground contact time) and 150+ sports modes.3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Workout Q1: auto detect for walking, running, cycling, rower, elliptical and jump rope. Q2 workout data: vertical stride ratio, vertical amplitude and ground contact time in running. 17 modes give pro data including pool and open water swimming. The Training State app manages training load.11Retailer pageeuronics.ee/en/phones/watches/smart-watches/bhr9195gl/xiaomi-watch-s4-black-smart-watchRead 15 October 2026Retailer spec tab lists maximal oxygen uptake (VO2 max) measurements as Yes.

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.

Heart rate strap, Power meter, Speed and cadence1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Peripheral list (note 16): heart rate belts, power meters, cadence meters and cycling speedometers. BLE devices only.

Not available

Safety

3 of 6 differ

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

No9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026Fall detection listed as not supported.

Not available

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.

No9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026Emergency SOS listed as not supported.

Not available

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.

No9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026LED flashlight listed as not supported. The control centre flashlight is a screen function.

Not available

Positioning

3 of 3 differ

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

GPS, GLONASS, Galileo, QZSS, BeiDou1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026The page says five satellite positioning systems and does not name them. The names come from a spec database.9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026Lists GPS, Galileo, GLONASS, QZSS and BeiDou. The e-manual GNSS receive range 1559-1610 MHz fits these systems.

GPS (L1 + L5), Galileo (E1 + E5a), GLONASS (G1), BeiDou (B1I + B1C + B2a), QZSS (L1 + L5)1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026Satellite systems: GPS, Galileo, Glonass, BeiDou and QZSS. The overview page says L1+L5 dual-frequency GNSS. The per-constellation bands come from the reseller copy of the manual regulatory table.7Spec databasegsmarena.com/xiaomi_watch_s4-13476.phpRead 15 October 2026Positioning: GPS (L1+L5), GLONASS, GALILEO, BDS, QZSS.9Retailer pageteamplush.by/enRead 15 October 2026Reseller page reproducing the M2425W1 manual regulatory table: GPS L1 / Galileo E1 / GLONASS G1 / BDS B1I, B1C / QZSS L1 at 1559-1610 MHz, and GPS L5 / Galileo E5a / BDS B2A / QZSS L5 at 1164-1215 MHz. This agrees with the maker's L1+L5 claim and GSMArena. Xiaomi's own manual PDF was not found, so the reseller copy is the source.

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

No4Owner's manualsupport.amazfit.com/en/amazfit_bip_max/imgs/electronic_manual.pdfRead 16 October 2026Basic Parameters: GNSS frequency range 1559-1610 MHz (RX). That is the L1 range only. The maker does not claim dual-band. Stored false.

Yes2Maker product pagemi.com/global/product/xiaomi-watch-s4Read 15 October 2026Overview: L1+L5 dual-frequency GNSS of five satellite positioning systems from an independent chip.

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

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Note 3: imports OSM map files for offline use. A route file must be imported for navigation.3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026

Not available

Connectivity

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

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Connection: Bluetooth, BLE 5.3.

Yes1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026

Bluetooth version

5.34Owner's manualsupport.amazfit.com/en/amazfit_bip_max/imgs/electronic_manual.pdfRead 16 October 2026Basic Parameters: Bluetooth version V5.3.

5.31Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026Wireless connectivity: Bluetooth 5.3.7Spec databasegsmarena.com/xiaomi_watch_s4-13476.phpRead 15 October 2026Bluetooth 5.3, A2DP, LE.9Retailer pageteamplush.by/enRead 15 October 2026The copied table lists Bluetooth 5.3 at 2400-2483.5 MHz.

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

Not available

No7Spec databasegsmarena.com/xiaomi_watch_s4-13476.phpRead 15 October 2026WLAN: No.9Retailer pageteamplush.by/enRead 15 October 2026The copied radio table lists only GNSS, Bluetooth and NFC, with no Wi-Fi radio.

Wi-Fi standard

Not available

Not available

Wi-Fi bands

Not available

Not available

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

No9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026No cellular listed. The maker Connection row lists Bluetooth only.

No7Spec databasegsmarena.com/xiaomi_watch_s4-13476.phpRead 15 October 2026Versions: eSIM and NFC (China), Bluetooth and NFC (China), Bluetooth only (International). The global page and the EU declaration list no cellular radio, so the global model has no cellular.

Network

Not available

Not available

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.

No7Press articlegagadget.com/en/711363-amazfit-bip-max-a-100-sports-watch-with-a-3000-nit-screen-and-offline-mapsRead 16 October 2026States no NFC, so no contactless payments.9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026NFC and contactless pay listed as not supported. The maker lists no payment feature.

Yes1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026NFC: Supported. The maker says availability may vary by region.9Retailer pageteamplush.by/enRead 15 October 2026The copied regulatory table lists an NFC operating frequency of 13.56 MHz.

Contactless payments

No9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026

Yes2Maker product pagemi.com/global/product/xiaomi-watch-s4Read 15 October 2026NFC payment supports Mastercard and Visa terminals. Availability varies by region and issuing bank.

Payment services

Not available

Xiaomi Pay3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026NFC related: bank cards are added through Mi Fitness, Device, Apps, Xiaomi Pay.

Ultra-wideband

No9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026UWB listed as not supported.

Not available

Satellite

None9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026No satellite SOS listed.

Not available

ANT+

No1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Note 16: connection to peripheral devices supports BLE devices only. ANT+ is not listed.

Not available

Audio

1 of 4 differ

Speaker

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Other: Mic and speaker supported.3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026

Yes1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026

Microphones

Not available

21Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026Spec row: 2 mics.

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

Phone only1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Smartphone Assistance: Bluetooth Calls supported. The watch has no cellular radio, so calls need the paired phone.3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026Bluetooth calling: make and receive calls on the watch through the Phone app while connected to the phone.

Phone only1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026Bluetooth calling: Supported while the watch stays connected to the phone's Bluetooth. Voice calls from third-party apps are not supported.

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

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026The manual's music player plays .mp3 files stored on the watch through the watch speaker or Bluetooth devices.3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026Music player: plays local music stored in the watch through the watch speaker or Bluetooth devices. Files transfer from the Zepp app.

Yes3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Q28: local music playback on the watch. An Android phone downloads the music. An iPhone cannot download songs, but songs already on the watch play.

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.

21Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Buttons: 2.3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026

13Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Q2: the 2 o'clock position has the function button and rotating crown. The 4 o'clock position has the power button. The crown is counted only in Crown.

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

Upper button, Lower button3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026Upper button and Lower button in the basic operations table.

Power button (4 o'clock)3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Q2: power button at 4 o'clock.

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

None3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026Controls are two buttons and the touchscreen. No crown is described.

Rotating2Maker product pagemi.com/global/product/xiaomi-watch-s4Read 15 October 2026The overview describes a classic rotating crown.3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Q2: stainless steel rotating crown that also works as a function button.

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

Not available

None3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Q11: the bezel is a removable decorative part that twists on for installation. The maker describes no bezel input.

Gestures

Cover the screen to turn it off, Raise wrist to wake the screen3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026Commonly used gestures table: cover the screen to turn it off. Raise-to-wake is part of the maker battery workload (note 1 on the store page).

Raise to wake, Double-tap to wake, Wrist flip, Wrist shake, Finger snap, Fist clench2Maker product pagemi.com/global/product/xiaomi-watch-s4Read 15 October 2026Quick gestures and a classic rotating crown are listed. The support FAQ names the gestures.3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Q24 lists wrist flip, wrist shake, finger snap and fist. Fist works only with HyperOS 2 phones. Raise to wake and double-tap to wake are in the display settings.

Battery and charging

9 of 13 differ

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

550mAh1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Battery Capacity 550 mAh (rated value).

486mAh1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026Capacity 486 mAh. Rated or typical is not stated.

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.

AAmazfit Bip Max

Mode	With solar	Hours (h)
Smartwatch	No	480
Heavy use	No	240
Always-on	No	168
GPS	No	40

Source1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Typical use up to 20 days, heavy use up to 10 days, AOD mode up to 7 days, continuous GPS up to 40 hours. Days converted exactly to hours. Note 1 gives the workloads. Typical: static watch face, heart rate every 5 minutes, sleep monitoring, three 30-minute GPS workouts a week. Heavy: heart rate every minute, stress and sleep breathing monitoring and 150 notifications a day. AOD scenario: heavy settings plus 10 hours a day of AOD standby. GPS is continuous activity with heart rate always on.

BXiaomi Watch S4

Mode	With solar	Hours (h)
Smartwatch	No	360
Always-on	No	120

Source2Maker product pagemi.com/global/product/xiaomi-watch-s4Read 15 October 2026Up to 15 days typical usage, tested by Xiaomi Internal Labs with factory defaults, AOD off, 100 messages a day, 200 wrist raises a day, 90 minutes of GNSS sports a week and 10-minute heart rate checks. The FAQ gives 14.5 days with an iPhone and 5 days with the Smart AOD option on. Days are converted exactly to hours.3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Charging and Battery Q1: typical 15 days (14.5 with an iPhone) and AOD 5 days, with the stated test conditions.

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.

480h=CalculatedFrom Claimed battery life

360h=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.

168h=CalculatedFrom Claimed battery life

120h=CalculatedFrom Claimed battery life

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.

40h=CalculatedFrom Claimed battery life

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.

Magnetic pins1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Packing list: magnetic charging head (no cable). The manual says the metal contacts on the back of the watch fit the charging base.

Magnetic pins1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026Charging port: 2-pin magnetic charging dock.

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

Use the supplied charging base with a Type-C USB cable on a power adapter or computer. The maker recommends an adapter with a charging current of 1 A or more. The adapter rating does not establish power accepted by the watch.4Owner's manualsupport.amazfit.com/en/amazfit_bip_max/imgs/electronic_manual.pdfRead 16 October 2026Charging the Watch: use the supplied charging base on a Type-C cable. An adapter with 1 A or more is recommended.

2-pin magnetic charging dock with a USB-A cable. The FAQ asks for a USB-A charger with 5 V output and at least 0.5 A.1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026The support FAQ gives the supply requirement.3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Charging Q2: USB-A charger with 5 V and at least 0.5 A output.

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.

Not available

Not available

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

Not available

Yes2Maker product pagemi.com/global/product/xiaomi-watch-s4Read 15 October 2026Overview headline: 5 minutes of fast charging delivers 2 days of usage.

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

Charge time5 minUse time48 h2Maker product pagemi.com/global/product/xiaomi-watch-s4Read 15 October 20265 minutes of charging for 2 days of usage. The FAQ says this follows the typical battery model, which is the typical-use workload.3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Charging Q1: 5 minutes of charging provides a 2-day boost under the typical battery model.

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.

Not available

60min3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Charging Q1 and Q2: about 60 minutes to fully charge.

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.

AAmazfit Bip Max

Not available

BXiaomi Watch S4

Test	Hours (h)
Mixed use, always-on	48

Source8Reviewgsmarena.com/xiaomi_watch_s4_review-news-67715.phpRead 15 October 2026Reviewer used AOD, notifications, a one-hour daily workout and sleep tracking. The most was three days when the watch nearly died, and two days was a consistent result. Stored as about 48 hours. Firmware and display brightness are not stated.

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.

22mm1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Strap > Width: 22 mm.

22mm3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Q7: strap width 22 mm.

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

No3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026Strap guide: insert the strap pin, then press the spring bar with a finger or tool. A spring bar is not a quick-release lever, so false.4Owner's manualsupport.amazfit.com/en/amazfit_bip_max/imgs/electronic_manual.pdfRead 16 October 2026Same spring bar instruction.

Yes3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Q6: the watch supports quick-release straps released through the spring bar.

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

Spring bar strap attachment, 22 mm strap width4Owner's manualsupport.amazfit.com/en/amazfit_bip_max/imgs/electronic_manual.pdfRead 16 October 2026Assembling the strap: align the strap pin with the lug hole and press the spring bar.

22 mm quick-release straps with spring bars3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Q6 and Q7: quick-release spring-bar straps, any 22 mm strap.

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

Silicone1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Strap > Materials: Liquid Silicone.

Fluoroelastomer3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Spec page names fluororubber straps for Black and Silver. Fluororubber is stored as fluoroelastomer.

Strap

Standard liquid silicone strap1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026The store names no strap model. The packing list says standard strap.

Fluororubber strap3Maker product pagemi.com/global/support/faq/details/KA-517264Read 15 October 2026Spec page strap rows for Black and Silver.

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

AAmazfit Bip Max

Not available

BXiaomi Watch S4

Size	Wrist (min) (mm)	Wrist (max) (mm)
Black fluororubber strap	140	210

Source1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026The Black and Silver fluororubber straps have an adjustable length of 140-210 mm approx. The maker publishes strap length, stored as the wrist range. The Rainbow set with fluororubber and nylon straps is 135-210 mm.

Regulatory

2 of 3 differ

FCC ID

Not available

Not available

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.

Not available

Not available

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.

Not available

0.232W/kg9Retailer pageteamplush.by/enRead 15 October 2026Same reseller copy: maximum SAR on the wrist 0.232 W/kg with no gap, against a 4.0 W/kg wrist limit averaged over 10 g, under the EU declaration. The near-mouth value of 0.132 W/kg is a body value and is not stored.

Other certifications

Not available

EU RED 2014/53/EU conformity, RoHS 2011/65/EU conformity4Maker spec sheet (PDF)i02.appmifile.com/229_operatorx_operatorx_xm/29/08/2026/0506b1d933bea38854867532d7b1e253.pdfRead 15 October 2026The declaration covers RE Directive 2014/53/EU and RoHS Directive 2011/65/EU.

In the box

1 of 2 differ

In the box

Smartwatch (including standard strap), Magnetic charging head (no cable), Instruction manual1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Packing List: smartwatch (including standard strap), magnetic charging head (no cable), instruction manual.

Xiaomi Watch S4 (including bezel and strap), Magnetic charging dock, User manual (including warranty notice)1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026Package contents row.

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

No1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Only a charging head is supplied. No cable and no mains adapter.

No1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026Package contents list only the watch, magnetic charging dock and manual. No power adapter.

Links

Not compared

Product page

us.amazfit.com/products/bip-max1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026

www.mi.com/global/product/xiaomi-watch-s42Maker product pagemi.com/global/product/xiaomi-watch-s4Read 15 October 2026

Spec sheet

us.amazfit.com/products/bip-max1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026

www.mi.com/global/product/xiaomi-watch-s4/specs1Maker product pagemi.com/global/product/xiaomi-watch-s4/specsRead 15 October 2026Global specs page. Base case and strap describe the Black version.

Manual

support.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdf3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026

Not available

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.

Not available

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Warranty

1 of 1 differ

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.

1year4Owner's manualsupport.amazfit.com/en/amazfit_bip_max/imgs/electronic_manual.pdfRead 16 October 2026Warranty and Return Policy: 12 months or the period local consumer law requires.

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