Smartwatches / Compare

Amazfit Balance vs Fitbit Versa 4

A

Product A: Amazfit

Balance

80 of 150 known

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B

Product B: Fitbit

Versa 4

89 of 150 known

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Only differences

AAmazfit Balance

BFitbit Versa 4

General

7 of 10 differ

Series

Balance3Press releaseprnewswire.com/news-releases/zepp-health-launches-amazfit-balance-with-ai-empowered-features-for-the-ultimate-in-balanced-living-301915603.htmlRead 13 October 2026The Amazfit Balance leads Amazfit's Lifestyle Series and follows the GTR and GTS families.

Versa3Press releaseblog.google/products-and-platforms/devices/fitbit/versa-4-sense-2Read 6 October 2026

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

A2286, A22875Owner's manualsupport.amazfit.com/en/amazfit_balance/imgs/electronic_manual.pdfRead 13 October 2026Product manual title: A2286/A2287.

FB523, FB523BKBK-US, FB523SRAG-US, FB523RGRW-US, FB523RGRD1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Regulatory and Safety Notices: Model FB523 for FCC, IC, EU, UK and the IP rating. Retail colour SKUs are not stored.16Retailer pageabt.com/Fitbit-Versa-4-Graphite-Aluminum-Black-Strap-Fitness-Smartwatch-24mm-FB523BKBKUS/p/182318.htmlRead 7 October 2026Retail colour SKU FB523BKBK-US. Regulatory assembly remains FB523.17Retailer pageabt.com/Fitbit-Versa-4-Platinum-Aluminum-Waterfall-Blue-Strap-Fitness-Smartwatch-24mm-FB523SRAGUS/p/182320.htmlRead 7 October 2026Retail colour SKU FB523SRAG-US. Regulatory assembly remains FB523.18Retailer pageabt.com/Fitbit-Versa-4-Copper-Rose-Aluminum-Pink-Sand-Strap-Fitness-Smartwatch-24mm-FB523RGRWUS/p/182319.htmlRead 7 October 2026Retail colour SKU FB523RGRW-US. Regulatory assembly remains FB523.19Retailer pagephotopoint.ee/en/sports-watches/3626308-fitbit-versa-4-smart-watch-nfc-gps-satellite-amoled-touchscreen-heart-rate-monitor-activityRead 7 October 2026Retail colour SKU FB523RGRD. Regulatory assembly remains FB523.

GTIN / EAN

Not available

810073611450, 810073611474, 810073611481, 81003885874616Retailer pageabt.com/Fitbit-Versa-4-Graphite-Aluminum-Black-Strap-Fitness-Smartwatch-24mm-FB523BKBKUS/p/182318.htmlRead 7 October 2026Exact FB523BKBK-US Black / Graphite Aluminum listing identifies 810073611450. Regional identifiers are not exchanged.17Retailer pageabt.com/Fitbit-Versa-4-Platinum-Aluminum-Waterfall-Blue-Strap-Fitness-Smartwatch-24mm-FB523SRAGUS/p/182320.htmlRead 7 October 2026Exact FB523SRAG-US Waterfall Blue / Platinum Aluminum listing identifies 810073611474. Regional identifiers are not exchanged.18Retailer pageabt.com/Fitbit-Versa-4-Copper-Rose-Aluminum-Pink-Sand-Strap-Fitness-Smartwatch-24mm-FB523RGRWUS/p/182319.htmlRead 7 October 2026Exact FB523RGRW-US Pink Sand / Copper Rose Aluminum listing identifies 810073611481. Regional identifiers are not exchanged.19Retailer pagephotopoint.ee/en/sports-watches/3626308-fitbit-versa-4-smart-watch-nfc-gps-satellite-amoled-touchscreen-heart-rate-monitor-activityRead 7 October 2026Exact FB523RGRD Beet Juice / Copper Rose Aluminum listing identifies 810038858746. Regional identifiers are not exchanged.

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

1 September 20233Press releaseprnewswire.com/news-releases/zepp-health-launches-amazfit-balance-with-ai-empowered-features-for-the-ultimate-in-balanced-living-301915603.htmlRead 13 October 2026Release of 1 September 2023, now available via the official Amazfit website.

24 August 20223Press releaseblog.google/products-and-platforms/devices/fitbit/versa-4-sense-2Read 6 October 2026Fitbit blog post dated Aug 24, 2022. Pre-orders started that day with worldwide availability this fall.

Status

Not available

Available2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026Google Store sells Versa 4 at 199.95 USD on the access date. That is a current price, not the launch price.

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.

Amazfit Balance 29Reviewnotebookcheck.net/New-Amazfit-Balance-2-smartwatch-launches-with-longer-battery-life.1015909.0.htmlRead 23 October 2026Notebookcheck says the Amazfit Balance 2 builds on the original Amazfit Balance from 2023 and compares it with its predecessor.

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.

$229.993Press releaseprnewswire.com/news-releases/zepp-health-launches-amazfit-balance-with-ai-empowered-features-for-the-ultimate-in-balanced-living-301915603.htmlRead 13 October 2026Prices starting from $229.99 USD. US prices exclude sales tax.

$229.954Press releaseblog.google/products-and-platforms/devices/fitbit/fitbit-sense-2-versa-4Read 6 October 2026Versa 4 is now available for $229.95 (USD). The Aug 24, 2022 announcement gives the same price. No euro launch price was found in a maker source.

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.

€249.93Press releaseprnewswire.com/news-releases/zepp-health-launches-amazfit-balance-with-ai-empowered-features-for-the-ultimate-in-balanced-living-301915603.htmlRead 13 October 2026Prices starting from 249.90 EUR, as published by Zepp Health. European prices include VAT.

Not available

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

Not available

US, GB, DE, EE2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026US, GB and DE maker stores offer the model. EE is a documented archived Beet retail listing, not a current-stock assertion.10Maker product pagestore.google.com/gb/product/fitbit_versa_4_specsRead 7 October 2026GB store offers Versa 4 at GBP 179.99 with Buy and all four colours. Current price is not a launch price.11Maker product pagestore.google.com/de/product/fitbit_versa_4_specsRead 7 October 2026DE store offers Versa 4 at EUR 199.95 with Kaufen and all four colours. Current price is not a launch price.19Retailer pagephotopoint.ee/en/sports-watches/3626308-fitbit-versa-4-smart-watch-nfc-gps-satellite-amoled-touchscreen-heart-rate-monitor-activityRead 7 October 2026Exact Beet FB523RGRD SKU was listed by Estonian retailer with Estonia delivery. Listing is now archived. This documents historical market scope rather than current stock.

ColoursiThe maker's own colour names

Sunset Grey, Midnight2Maker product pageus.amazfit.com/products/amazfit-balanceRead 13 October 2026Color options: Sunset Grey and Midnight. The global Amazfit page also lists four Special Edition colours (Woodland, Meadow, Deep Sea Blue and Lagoon), which are not stored. Availability differs per region.

Black / Graphite Aluminum, Waterfall Blue / Platinum Aluminum, Pink Sand / Copper Rose Aluminum, Beet Juice / Copper Rose Aluminum2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026

Segment

Smartwatch3Press releaseprnewswire.com/news-releases/zepp-health-launches-amazfit-balance-with-ai-empowered-features-for-the-ultimate-in-balanced-living-301915603.htmlRead 13 October 2026Presented as a lifestyle smartwatch for work, leisure and workouts.

Smartwatch2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026Page title: Fitbit Versa 4 Smartwatch. The Aug 24, 2022 Fitbit blog calls it a fitness smartwatch.

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.

46mm2Maker product pageus.amazfit.com/products/amazfit-balanceRead 13 October 2026Highlights: modern thin design with 46mm (1.8in) case.

Not available

Case shape

Round7Spec databasegadgetsandwearables.com/technical-specs/amazfit-balanceRead 13 October 2026Physical size 46 x 46 mm and a 1.5 inch display. Product images show a round case.

Rectangular7Reviewtechradar.com/reviews/fitbit-versa-4Read 6 October 2026Design and display: a friendly-looking square-faced watch. The Google Store gives equal 40.5 mm length and width.

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 materials7Spec databasegadgetsandwearables.com/technical-specs/amazfit-balanceRead 13 October 2026Material: aluminum alloy middle frame and fibre-reinforced polymer bottom shell.

Aluminium1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Materials: The housing and buckle on Versa 4 are made of aluminum.

Case material (as published)

Aluminum alloy middle frame and fibre-reinforced polymer bottom shell7Spec databasegadgetsandwearables.com/technical-specs/amazfit-balanceRead 13 October 2026Aluminum alloy middle frame + fibre-reinforced polymer bottom shell.

Aluminum1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026

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

Fibre-reinforced polymer bottom shell7Spec databasegadgetsandwearables.com/technical-specs/amazfit-balanceRead 13 October 2026Fibre-reinforced polymer bottom shell.

Plastic7Reviewtechradar.com/reviews/fitbit-versa-4Read 6 October 2026Design and display: the bezel is aluminum and the rear is plastic. Fitbit publishes no back material.

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

Height46Width46Thickness10.6mm(1.8 × 1.8 × 0.4 in)7Spec databasegadgetsandwearables.com/technical-specs/amazfit-balanceRead 13 October 2026Physical size 46 x 46 x 10.6 mm.

Height40.5Width40.5Thickness11.2mm(1.6 × 1.6 × 0.4 in)2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026Dimensions and weight: Length 40.5 mm, Width 40.5 mm, Height 11.2 mm. Height is stored as thickness. The listed weight of 37.64 g does not say whether it includes the band, so neither weight field is filled.

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

35g(1.2 oz)7Spec databasegadgetsandwearables.com/technical-specs/amazfit-balanceRead 13 October 2026Weight 35 g without strap.

Not available

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

Not available

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 pageamazfit.com/products/amazfit-balanceRead 13 October 2026Water-resistance Grade 5 ATM. Footnote 24 says 50 m per ISO 22810-2010.

5ATM1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Environmental conditions: Water resistant up to 50 meters. Fitbit publishes no ATM figure. 50 m equals the 5 ATM static pressure rating.12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026Maker comparison explicitly publishes 5 ATM for Versa 4. The existing value is now directly maker-supported, without deriving pressure from metres.

Water resistance standard

ISO 22810:20101Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Footnote 24: ISO 22810-2010.

IEC 605291Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Manual printed page 74 explicitly rates FB523 IPX8 under IEC 60529 up to 50 metres. IEC 60529 applies to water ingress, not an inferred ISO pressure or diving test. Maker comparison independently publishes 5 ATM.

Dust and water rating

Not available

IP6X, IPX81Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026IP Rating section: IPX8 under IEC 60529 up to a depth of 50 meters, and IP6X dust-tight. Stored as the two published codes.

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°C5Owner's manualsupport.amazfit.com/en/amazfit_balance/imgs/electronic_manual.pdfRead 13 October 2026Basic parameters: operating temperature 0 C to 45 C.

Min-10Max45°C1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Environmental conditions table: operating temperature 14 to 113 F (-10 to 45 C). Non-operating and charging (0 to 35 C) ranges excluded. The Google Store specs page prints -14 to 113 F, which conflicts. The manual table, which states both units, is used.

Display

5 of 14 differ

Display type

OLED1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Display: Material AMOLED.

OLED2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026

Display type (as published)

AMOLED1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026AMOLED.

AMOLED2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026Display: AMOLED display, Corning Gorilla Glass 3.

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)1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Technical Specifications, Display: Size 1.5 inch.

1.58in(4 cm)6Reviewpcmag.com/reviews/fitbit-versa-4Read 6 October 2026Both feature a 1.58-inch AMOLED display (Versa 4 and Sense 2). Fitbit publishes no diagonal. Android Central, Trusted Reviews and Stuff state the same 1.58 inches.

Resolution

480 × 480px1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Display: Resolution 480x480.

336 × 336px6Reviewpcmag.com/reviews/fitbit-versa-4Read 6 October 2026The 336-by-336-pixel display. TechRadar and Android Central state 336 x 336 as well. No pixel density is stored because none is published.7Reviewtechradar.com/reviews/fitbit-versa-4Read 6 October 2026The screen is a 336 x 336 pixel OLED just like the Versa 3's.

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

323ppi7Spec databasegadgetsandwearables.com/technical-specs/amazfit-balanceRead 13 October 2026480 x 480 pixels, 323 ppi.

Not available

Display area

Not available

Not available

Touchscreen

Yes6Owner's manualsupport.amazfit.com/en/amazfit_balance/files/user-manual.pdf.pdfRead 13 October 2026Swipe and tap gestures, plus the digital crown, control the watch.

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Navigate Versa 4: Versa 4 has a color AMOLED touchscreen display and 1 button.

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.

Not available

Not available

Minimum brightness

Not available

Not available

Always-on display

Yes6Owner's manualsupport.amazfit.com/en/amazfit_balance/files/user-manual.pdf.pdfRead 13 October 2026Always On Display setting under Settings > Display > Always On.

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Adjust always-on display section.

Display cover

Other glass1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Tempered glass, which is not sapphire or Gorilla Glass, so the other glass option is used.

Gorilla Glass2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026

Display cover (as published)

Tempered glass with anti-glare glass bezel and anti-fingerprint coating1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Display: touchscreen of tempered glass with anti-glare glass bezel and anti-fingerprint coating.

Corning Gorilla Glass 32Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026

Platform

6 of 15 differ

Platform

Proprietary3Press releaseprnewswire.com/news-releases/zepp-health-launches-amazfit-balance-with-ai-empowered-features-for-the-ultimate-in-balanced-living-301915603.htmlRead 13 October 2026Release: enhanced Zepp OS 3.0, Zepp Health's own watch OS.

Proprietary3Press releaseblog.google/products-and-platforms/devices/fitbit/versa-4-sense-2Read 6 October 2026

OS at launch

Zepp OS 3.03Press releaseprnewswire.com/news-releases/zepp-health-launches-amazfit-balance-with-ai-empowered-features-for-the-ultimate-in-balanced-living-301915603.htmlRead 13 October 2026Release: enhanced Zepp OS 3.0. Android Central says it ran Zepp OS 3.5 out of the box and Notebookcheck says 3.2, which are not stored.

Fitbit OS3Press releaseblog.google/products-and-platforms/devices/fitbit/versa-4-sense-2Read 6 October 2026Powered by the new Fitbit OS. No version number is published.

Software

Not available

Not available

Latest OS

Zepp OS 44Press releasezepp.com/press-release/zepp-health-introduces-zepp-os-4-redefining-wearable-intelligence-by-integrating-openais-gpt-4o-into-its-amazfit-smartwatchesRead 13 October 2026Release of 2 July 2024: Zepp OS 4 is available for the Amazfit Balance and Amazfit Active, the first Amazfit smartwatches to get it. The date of access dates the figure and later updates may exist.

Fitbit OS, firmware 220.3113Maker product pagesupport.google.com/googlehealth/answer/14236725Read 7 October 2026Latest maker-listed Versa 4 device firmware on access date. No unreported Fitbit OS major version is assigned. Updates are phased.

Works with

Android, iOS1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Supported Devices: Android 7.0 and above, iOS 14.0 and above.

iOS, Android2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026

Phone requirement

Android 7.0 or iOS 14.0 or above. Needs the Zepp app.1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Supported Devices: Android 7.0 and above, iOS 14.0 and above. Application: Zepp App.5Owner's manualsupport.amazfit.com/en/amazfit_balance/imgs/electronic_manual.pdfRead 13 October 2026Device requirements: Android 7.0 or iOS 14.0 or above.

Google Health app on a compatible device running Apple iOS 16.4 or higher or Android OS 11.0 or higher2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026Requirements section, current on the access date. The 2022 launch requirement may have been lower.

App store

Yes7Spec databasegadgetsandwearables.com/technical-specs/amazfit-balanceRead 13 October 2026Zepp OS app store.8Reviewandroidcentral.com/wearables/amazfit-balance-reviewRead 13 October 2026Review: a good selection of apps. It does not have Spotify or WhatsApp.

No6Reviewpcmag.com/reviews/fitbit-versa-4Read 6 October 2026The Versa 4 does not support third-party app downloads, with the exception of watch faces.

Voice assistants

Zepp Flow, Amazon Alexa1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Lifestyle Features list Zepp Flow and Amazon Alexa.4Press releasezepp.com/press-release/zepp-health-introduces-zepp-os-4-redefining-wearable-intelligence-by-integrating-openais-gpt-4o-into-its-amazfit-smartwatchesRead 13 October 2026Release: Zepp OS 4 brings Zepp Flow with GPT-4o to the Balance.8Reviewandroidcentral.com/wearables/amazfit-balance-reviewRead 13 October 2026Review: use Alexa on the watch or change the assistant to Zepp Flow.

Amazon Alexa1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Voice Assistant: Amazon Alexa Built-in. Needs the phone app running in the background. Not available in all countries.

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

None of 2 known

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.

Not available

Not available

Health sensors

5 of 8 differ

Heart rate sensor

BioTracker 5.0 PPG biometric optical sensor (dual-LED, 8PD)1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Sensors: BioTracker 5.0 PPG biometric sensor (8PD + 2LED). The two LEDs are stored as dual-LED.3Press releaseprnewswire.com/news-releases/zepp-health-launches-amazfit-balance-with-ai-empowered-features-for-the-ultimate-in-balanced-living-301915603.htmlRead 13 October 2026Release: upgraded dual-LED and 8PD BioTracker 5.0 PPG biometric optical sensor.

Multi-path optical heart rate sensor1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Sensors and Components: Multi-path optical heart rate tracker. Google Store spells it Multi-path optical heart rate sensor.

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

No7Spec databasegadgetsandwearables.com/technical-specs/amazfit-balanceRead 13 October 2026ECG no.

No4Press releaseblog.google/products-and-platforms/devices/fitbit/fitbit-sense-2-versa-4Read 6 October 2026The ECG app is named for Sense 2 only, while Irregular Heart Rhythm Notifications are on both watches. Versa 4 has no electrical heart sensor in its sensor list.6Reviewpcmag.com/reviews/fitbit-versa-4Read 6 October 2026The Sense 2 adds an electrocardiogram (ECG) sensor.

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

Yes6Owner's manualsupport.amazfit.com/en/amazfit_balance/files/user-manual.pdf.pdfRead 13 October 2026The manual explains how to wear the watch for blood oxygen measurement.7Spec databasegadgetsandwearables.com/technical-specs/amazfit-balanceRead 13 October 2026SpO2 yes, blood oxygen yes all day.

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Sensors and Components: red and infrared sensors for oxygen saturation (SpO2) monitoring. Not available in all countries and not for medical use.

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

Yes1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Sensors list a temperature sensor.

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Track your sleep and Advanced health metrics: skin temperature variation from personal baseline. It reports variation only, not an absolute temperature.2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026Sensors and components: Device temperature sensor (skin temperature variation available in the Google Health app). Variation only, not in all markets.

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

Not available

None14Spec databasegadgetsandwearables.com/technical-specs/fitbit-versa-4Read 7 October 2026Explicit absence of blood-pressure feature. Maker comparison also lacks blood-pressure trends.

Body composition sensor

Yes1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Sensors list the BIA bioelectric impedance sensor.5Owner's manualsupport.amazfit.com/en/amazfit_balance/imgs/electronic_manual.pdfRead 13 October 2026Body composition measurement with two fingers on the crown and the back button, with eight values.

Not available

Skin conductance (EDA)

Not available

No3Press releaseblog.google/products-and-platforms/devices/fitbit/versa-4-sense-2Read 6 October 2026The continuous EDA (cEDA) Body Response sensor is described for Sense 2 only. Versa 4 has no EDA sensor in its own sensor list.6Reviewpcmag.com/reviews/fitbit-versa-4Read 6 October 2026The Sense 2 adds a cEDA sensor and an ECG sensor that the Versa 4 lacks.

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

Not available

Irregular Heart Rhythm Notifications: FDA clearance, Irregular Heart Rhythm Notifications: EU clearance4Press releaseblog.google/products-and-platforms/devices/fitbit/fitbit-sense-2-versa-4Read 6 October 2026Both of these tools have FDA and EU clearance: the Sense 2 ECG app and the Irregular Heart Rhythm Notifications on both watches. Select countries only, not for people under 22 or with known AFib.

Motion and environment sensors

2 of 9 differ

Accelerometer

Yes1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Sensors list an acceleration sensor.

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026

Accelerometer range

Not available

Not available

Gyroscope

Yes1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Sensors list a gyroscope.

No12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026Versa 4 column explicitly lacks the gyroscope.

Barometric altimeter

Yes1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Sensors list an air pressure sensor.

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Sensors and Components: Altimeter, which tracks altitude changes. Restart section names a small hole on the device for the altimeter, which is the pressure-sensor vent. Published only as Altimeter.

Compass

Not available

No12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026Versa 4 column explicitly lacks the compass.

Ambient light sensor

Yes1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Sensors list an ambient light sensor.

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 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.

Heart rate alerts, Blood oxygen app, Heart rate variability, Sleep tracking, Stress tracking, Readiness score, Body composition3Press releaseprnewswire.com/news-releases/zepp-health-launches-amazfit-balance-with-ai-empowered-features-for-the-ultimate-in-balanced-living-301915603.htmlRead 13 October 2026Release: Readiness score each morning, and body composition measurement of body fat, skeletal muscle, muscle, water, bone mass, protein, BMI and basal metabolism.6Owner's manualsupport.amazfit.com/en/amazfit_balance/files/user-manual.pdf.pdfRead 13 October 2026Readiness score, body composition, heart rate alerts and sleep. Also stress and HRV in the Readiness explanation.7Spec databasegadgetsandwearables.com/technical-specs/amazfit-balanceRead 13 October 2026Sleep yes, HRV yes, stress yes, blood oxygen yes, heart rate alerts for arrhythmia and atrial fibrillation, body composition yes (BIA).

Continuous heart rate, Heart rate alerts, Irregular rhythm notifications, Blood oxygen app, Heart rate variability, Sleep tracking, Sleep stages, Stress tracking, Readiness score, Cycle tracking1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Today app stats: heart rate, oxygen saturation, readiness, stress management score, menstrual health. Track your sleep: sleep stages. Receive heart-rate notifications: high and low heart rate. Advanced health metrics: heart-rate variability. Daily readiness and some detail need Fitbit Premium per the maker blog.3Press releaseblog.google/products-and-platforms/devices/fitbit/versa-4-sense-2Read 6 October 202624/7 heart rate monitoring, sleep tracking and Stress Management Score.4Press releaseblog.google/products-and-platforms/devices/fitbit/fitbit-sense-2-versa-4Read 6 October 2026Irregular Heart Rhythm Notifications on both watches.

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, Route navigation, Trackback6Owner's manualsupport.amazfit.com/en/amazfit_balance/files/user-manual.pdf.pdfRead 13 October 2026Over 150 workout modes with automatic workout identification, VO2 Max, training load and total recovery time, pool and open water swimming, track navigation with route import, and return to start with Backtrack.

Automatic workout detection, VO2 max, Pool swim, Interval workouts, Turn-by-turn navigation1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Track your exercise automatically (SmartTrack, 15 minute minimum). Exercise settings list Pool Length and Interval. Google Maps app gives turn-by-turn directions and needs the paired phone nearby with the app running. View your cardio fitness score in the Fitbit app (stored as vo2_max, see the Google Health VO2 max help page).9Maker product pagesupport.google.com/googlehealth/answer/14237924Read 6 October 2026Learn about your VO2 max: tap VO2 max (formerly known as cardio fitness score). The Versa 4 manual names the cardio fitness score. VO2 max is estimated during outdoor runs with GPS.

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

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

No7Spec databasegadgetsandwearables.com/technical-specs/amazfit-balanceRead 13 October 2026Fall detection no.

No12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026Versa 4 column explicitly lacks general fall detection.

Car crash detection

Not available

No12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026Versa 4 column explicitly lacks car crash detection.

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.

No7Spec databasegadgetsandwearables.com/technical-specs/amazfit-balanceRead 13 October 2026Emergency SOS no.

No12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026Versa 4 column explicitly lacks manual emergency SOS.

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.

No7Spec databasegadgetsandwearables.com/technical-specs/amazfit-balanceRead 13 October 2026LED flashlight no.

No14Spec databasegadgetsandwearables.com/technical-specs/fitbit-versa-4Read 7 October 2026Explicit absence of dedicated LED flashlight. Display illumination is not that hardware feature.

Positioning

3 of 3 differ

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

Not available

GPS, GLONASS1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Sensors and Components: Built-in GPS receiver + GLONASS. Dynamic GPS can use the phone's GPS instead to save battery. No band or dual-frequency claim.

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

Yes1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Positioning: dual-band positioning with 6 satellite positioning systems. The systems are not named, so no positioning list is stored.

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

No14Spec databasegadgetsandwearables.com/technical-specs/fitbit-versa-4Read 7 October 2026Explicit no offline maps. Maker manual requires phone navigation and background app. Directions are not stored cartographic maps.

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 pageamazfit.com/products/amazfit-balanceRead 13 October 2026Connection: Bluetooth 5.0.

Not available

Bluetooth version

5.05Owner's manualsupport.amazfit.com/en/amazfit_balance/imgs/electronic_manual.pdfRead 13 October 2026Basic parameters: Bluetooth version V5.0.

5.01Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Wireless technology: Bluetooth 5.0 radio transceiver and NFC chip. Wi-Fi hardware is listed as deactivated and cannot be turned on, so no Wi-Fi standard is stored.

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 pageamazfit.com/products/amazfit-balanceRead 13 October 2026Connection: WLAN 2.4GHz.

Not available

Wi-Fi standard

Wi-Fi 45Owner's manualsupport.amazfit.com/en/amazfit_balance/imgs/electronic_manual.pdfRead 13 October 2026Basic parameters: Wi-Fi 2.4 GHz 802.11 b/g/n, so Wi-Fi 4 on one band.

Not available

Wi-Fi bands

2.4 GHz5Owner's manualsupport.amazfit.com/en/amazfit_balance/imgs/electronic_manual.pdfRead 13 October 2026Wi-Fi frequency 2402-2480 MHz, 2.4 GHz only.

Not available

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

No7Spec databasegadgetsandwearables.com/technical-specs/amazfit-balanceRead 13 October 2026Cellular no.

No8Reviewtomsguide.com/reviews/fitbit-versa-4Read 7 October 2026Fitbit's watches don't have cellular support. Only one radio configuration (FB523, Bluetooth and NFC) exists in the manual.

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.

Yes7Spec databasegadgetsandwearables.com/technical-specs/amazfit-balanceRead 13 October 2026NFC / connected pay yes (Zepp Pay, region-dependent).

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026

Contactless payments

Yes3Press releaseprnewswire.com/news-releases/zepp-health-launches-amazfit-balance-with-ai-empowered-features-for-the-ultimate-in-balanced-living-301915603.htmlRead 13 October 2026Release: Zepp Pay contactless payment.7Spec databasegadgetsandwearables.com/technical-specs/amazfit-balanceRead 13 October 2026NFC / connected pay yes (Zepp Pay, region-dependent).

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026

Payment services

Zepp Pay3Press releaseprnewswire.com/news-releases/zepp-health-launches-amazfit-balance-with-ai-empowered-features-for-the-ultimate-in-balanced-living-301915603.htmlRead 13 October 2026Release: Zepp Pay contactless payment, with Mastercard issuing banks and Curve.

Google Wallet1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Contactless Payments: set up Google Wallet in the app. The manual also names the legacy Fitbit Pay app, which Google is phasing out. Card, bank and country limits apply.

Ultra-wideband

No7Spec databasegadgetsandwearables.com/technical-specs/amazfit-balanceRead 13 October 2026UWB no.

No12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026Versa 4 column explicitly lacks UWB radio.

Satellite

Not available

None12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026No satellite SOS. Published transmitters are Bluetooth/NFC. GPS reception is separate.

ANT+

Not available

Not available

Audio

1 of 4 differ

Speaker

Yes1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Other: Microphone and Speaker are listed as supported.8Reviewandroidcentral.com/wearables/amazfit-balance-reviewRead 13 October 2026Review: microphone and speaker onboard.

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Sensors and Components lists Speaker and Microphone. The Google Store rates the speaker at 75 dB SPL at 10 cm. That is not an emergency siren.

Microphones

Not available

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 only6Owner's manualsupport.amazfit.com/en/amazfit_balance/files/user-manual.pdf.pdfRead 13 October 2026Bluetooth calling: pair the watch with the phone and make calls through the Phone app on the watch.

Phone only1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Answer or reject phone calls: on-wrist calls through the paired iPhone or Android phone, which must be nearby with the Fitbit app running. No cellular model exists.

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

Yes1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Lifestyle Features: Music Storage up to 2.2GB.7Spec databasegadgetsandwearables.com/technical-specs/amazfit-balanceRead 13 October 2026On-board music storage yes.8Reviewandroidcentral.com/wearables/amazfit-balance-reviewRead 13 October 2026Review: local storage and Bluetooth let you store music on the watch and stream it to earbuds.

No7Reviewtechradar.com/reviews/fitbit-versa-4Read 6 October 2026You can't store music on the watch. Tom's Guide also says you can't download music to the Versa 4.8Reviewtomsguide.com/reviews/fitbit-versa-4Read 7 October 2026You can't download music to the Versa 4 or install third-party apps.

Controls

4 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.

15Owner's manualsupport.amazfit.com/en/amazfit_balance/imgs/electronic_manual.pdfRead 13 October 2026Upper button doubles as the rotating crown. One lower button is counted.

11Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Navigate Versa 4: color AMOLED touchscreen display and 1 button.

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

Lower button5Owner's manualsupport.amazfit.com/en/amazfit_balance/imgs/electronic_manual.pdfRead 13 October 2026About the watch: upper button that rotates, and a lower button that starts an app.

Button1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Maker calls the single operating control Button. Strap-release latches are excluded.

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

Rotating5Owner's manualsupport.amazfit.com/en/amazfit_balance/imgs/electronic_manual.pdfRead 13 October 2026Upper button: rotate to switch pages. User manual calls it the digital crown.

None1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026The controls are the touchscreen and 1 button. There is no rotating crown.

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

None5Owner's manualsupport.amazfit.com/en/amazfit_balance/imgs/electronic_manual.pdfRead 13 October 2026About the watch lists the upper button, lower button, charging contacts, heart rate sensor and biosensors. It lists no rotating bezel.

Not available

Gestures

Not available

Turn your wrist, Briefly cover the watch face with your opposite hand, Triple-tap the screen1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Manual screen-wake setting documents selectable wrist-turn wake. Printed page 22 says briefly covering the face turns the screen off, except when always-on display is enabled. Printed page 20 says triple-tap zoom works after Magnify is enabled. These are interface gestures, not unsupported inertial sensor features.

Battery and charging

8 of 13 differ

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

475mAh1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026475 mAh (rated value).

Not available

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 Balance

Mode	With solar	Hours (h)
Smartwatch	No	336
Heavy use	No	168
Always-on	No	120
Low power	No	600
Time only	No	1,200
GPS, dual-band	No	26
GPS, power saving	No	52

Source1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Typical use up to 14 days, heavy use up to 7 days, AOD mode up to 5 days, Battery Saver up to 25 days and Clock Mode up to 50 days. Accuracy GPS up to 26 hours and Power Saving GPS up to 52 hours. Automatic GPS is listed at 47 hours with a footnote of about 44 hours, so it is left out. Days are converted to hours exactly. Accuracy GPS is stored as the dual-frequency mode and Power Saving GPS as the GPS power saving mode, after the maker preset name. A second copy of the table on the same page lists Battery Saver as 14 days. The highlights, the first table and the US, German and India pages all say 25 days, so 25 is stored.2Maker product pageus.amazfit.com/products/amazfit-balanceRead 13 October 2026Highlights: 14 days typical usage, 5 days AOD mode and 25 days Battery Saver Mode. The FAQ also says battery saver mode extends it to 25 days.

BFitbit Versa 4

Mode	With solar	Hours (h)
Smartwatch	No	144
Always-on	No	72
GPS	No	12

Source5Maker product pagesupport.google.com/googlehealth/answer/14226518Read 6 October 2026Battery life table: Fitbit Versa 4* 6+ days, stored as 144 h as a minimum figure. Footnote *: always-on display and GPS need more frequent charging. If you turn on always-on display: Versa 4 up to 3 days (72 h). If you use built-in GPS continuously: Versa 4 up to 12 hours. The 2025 pre-production test footnote (**) belongs to Google Fitbit Air, not Versa 4.

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.

336h=CalculatedFrom Claimed battery life

144h=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.

120h=CalculatedFrom Claimed battery life

72h=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.

Not available

12h=CalculatedFrom Claimed battery life

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 pageamazfit.com/products/amazfit-balanceRead 13 October 2026Battery: Magnetic charging.

Magnetic pins1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Charge your watch: the cable end attaches magnetically to the port on the back and its pins align with the port.

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

The manual lists an input of DC 5 V 800 mA max and says to use a power adapter of 1 A or above. The watch sits in the supplied charging base with metal contacts. The adapter is not in the box.5Owner's manualsupport.amazfit.com/en/amazfit_balance/imgs/electronic_manual.pdfRead 13 October 2026Charging: use the charging base that comes with the watch. Use a 1 A or above power adapter. Input DC 5 V 800 mA max.

Not available

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

Yes4Press releaseblog.google/products-and-platforms/devices/fitbit/fitbit-sense-2-versa-4Read 6 October 2026Fast charging gets you a full day's worth of battery in just 12 minutes.

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 time12 minUse time24 h1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Charge Versa 4 for 12 minutes for 24 hours of battery life.

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.

120min1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Theoretical charging duration approx. 2 hours. Nominal claim.

120min2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026Battery and power: Charge time (0-100%): Two hours. The manual says charging fully takes about 1-2 hours.

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.

Not available

Not available

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

60min8Reviewtomsguide.com/reviews/fitbit-versa-4Read 7 October 2026Reviewer observed depleted-to-full charging using the proprietary USB-A-ended charging arrangement. Standard 40.5 mm Copper Rose review unit. USB power adapter, ambient temperature and firmware are unstated. This is a measured result, separate from the maker two-hour claim. Partial-discharge runtime projections are not added.

Strap

6 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 pageamazfit.com/products/amazfit-balanceRead 13 October 2026Strap: Width 22mm.

Not available

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

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Change the band: slide the flat latch button toward the band and pull. Attach by pressing until it clicks. No tools.

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

22 mm nylon or liquid silicone strap1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Strap: nylon and liquid silicone, width 22mm, with hook-and-loop (nylon) or pin buckle (silicone).

Proprietary latch connector. Fitbit Sense, Sense 2 and Versa 3 bands are compatible.1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Change the band: Fitbit Sense, Fitbit Sense 2, and Fitbit Versa 3 bands are compatible with Versa 4. Turn over Versa 4 and find the band latches. Slide the flat button toward the band to release the latch. Proprietary connector, no lug width published.

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

Not available

Other1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Supplied classic band is elastomer. Other preserves that wording without guessing silicone, HNBR or fluoroelastomer.

Strap

Not available

Classic band2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026Maker box lists Classic band in small and large sizes. Manual printed page 57 states flexible durable elastomer. band_material=other preserves that published material without guessing a specific polymer.

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 Balance

Size	Wrist (min) (mm)	Wrist (max) (mm)
Silicone strap	140	215
Nylon strap	140	210

Source1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Strap wrist dimensions: 140 to 215 mm for the liquid silicone strap and 140 to 210 mm for the nylon strap.

BFitbit Versa 4

Size	Wrist (min) (mm)	Wrist (max) (mm)
Small	140	180
Large	180	220

Source1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Band size table: Small 140-180 mm, Large 180-220 mm wrist circumference. The Google Store specs page prints Small 5.1-7 in and Large 6.5-8.6 in. The manual table is used.

Regulatory

1 of 3 differ

FCC ID

Not available

XRAFB5231Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026USA FCC statement: Model FB523, FCC ID XRAFB523. IC 8542A-FB523.

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

Not available

Other certifications

Not available

RED (2014/53/EU), UK Radio Equipment Regulations 2017, IEC 62368-1:20181Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Manual printed page 62 declares FB523 compliance with RED 2014/53/EU. Printed page 72 declares UK Radio Equipment Regulations 2017. Printed page 74 lists testing to IEC 62368-1:2018 safety certification. These are model declarations and safety tests, not medical, military or diving certifications.

In the box

1 of 2 differ

In the box

Smartwatch with band × 1, Charging base × 1, Instruction Manual × 11Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Packing List: smartwatch with standard strap, magnetic charging cable and instruction manual. The manual lists a charging base.5Owner's manualsupport.amazfit.com/en/amazfit_balance/imgs/electronic_manual.pdfRead 13 October 2026Package contents: smartwatch with the band, charging base and instruction manual.

Fitbit Versa 4, Classic band (small & large), Charging cable2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026

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

No5Owner's manualsupport.amazfit.com/en/amazfit_balance/imgs/electronic_manual.pdfRead 13 October 2026Package contents list no power adapter.

No2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026What's in the box lists only Fitbit Versa 4, Classic band (small & large) and Charging cable. No power adapter.

Links

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Product page

www.amazfit.com/products/amazfit-balance1Maker product pageamazfit.com/products/amazfit-balanceRead 13 October 2026Amazfit global store page for the Amazfit Balance, with the full Technical Specifications table.

store.google.com/us/product/fitbit_versa_4_specs2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026

Spec sheet

Not available

store.google.com/us/product/fitbit_versa_4_specs2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026Online maker specification sheet for regulatory model FB523.

Manual

support.amazfit.com/en/amazfit_balance/files/user-manual.pdf.pdf6Owner's manualsupport.amazfit.com/en/amazfit_balance/files/user-manual.pdf.pdfRead 13 October 2026Amazfit Balance user manual, 59 pages.

storage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsK1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Versa 4 User Manual Version 2.1, linked from the Fitbit user manuals help page (support.google.com/googlehealth/answer/14253977).

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

Not available

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.

Not available

1year15Maker product pagesupport.google.com/product-documentation/answer/14815834Read 7 October 2026Manufacturer contractual warranty for original new US Fitbit Versa 4 / FB523 retail units purchased before July 11, 2023: one year. Exact US Abt FB523BKBK-US also states one-year limited parts/labour warranty. The original maker contract separately gives two years for an EEA resident purchasing in the EEA, including the retained Estonian market. This scalar applies only to the stated US source-market contract, not all variants. Later purchases use the separate Google Hardware Warranty Center terms.16Retailer pageabt.com/Fitbit-Versa-4-Graphite-Aluminum-Black-Strap-Fitness-Smartwatch-24mm-FB523BKBKUS/p/182318.htmlRead 7 October 2026Exact new US FB523BKBK-US listing states one-year limited parts and labour warranty. This source-market claim is distinct from the maker two-year EEA contract and does not set the Estonian variant warranty.

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