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Fitbit Versa 4

FitbitSmartwatch

Versa 4

Released 29 September 2022.4Press releaseblog.google/products-and-platforms/devices/fitbit/fitbit-sense-2-versa-4Read 6 October 2026Blog post dated Sep 29, 2022: Sense 2 and Versa 4 are available starting today. Versa 4 is now available for $229.95 at Fitbit.com, Google Store and select global retailers. Last checked 7 October 2026.

Case size
Not available
Platform
Proprietary
Display type
OLED
Battery life
144h

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General

Series
Versa3Press releaseblog.google/products-and-platforms/devices/fitbit/versa-4-sense-2Read 6 October 2026
Model numbers
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
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.
Announced
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
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.
Predecessor
Not available
Successor
Not available
Launch price (US)
$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)
Not available
Markets
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.
Colours
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
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 promised
Not available
Security updates until
Not available

Case

Front and side, drawn to scale.

Case size
Not available
Case shape
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 material
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)
Aluminum1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026
Back
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 dimensions
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)
Not available
Weight with strap
Not available

Durability

Water resistance
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
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
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
Max dive depth
Not available
MIL-STD-810
Not available
MIL-STD-810 tests
Not available
Operating temperature
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

Display type
OLED2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026
Display type (as published)
AMOLED2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026Display: AMOLED display, Corning Gorilla Glass 3.
Screen size
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
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 density
Not available
Display area
Not available
Touchscreen
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 rate
Not available
Min refresh rate
Not available
Peak brightness
Not available
Minimum brightness
Not available
Always-on display
Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Adjust always-on display section.
Display cover
Gorilla Glass2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026
Display cover (as published)
Corning Gorilla Glass 32Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026

Platform

Platform
Proprietary3Press releaseblog.google/products-and-platforms/devices/fitbit/versa-4-sense-2Read 6 October 2026
OS at launch
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
Latest OS
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
iOS, Android2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026
Phone requirement
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
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
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
Process
Not available
CPU cores
Not available
CPU configuration
Not available
Max CPU clock
Not available
GPU
Not available
Low-power coprocessor
Not available

Memory

We could not find any of these 2 fields. Show them
RAM
Not available
Storage
Not available

Health sensors

Heart rate 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 capability
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 sensing
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 sensing
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 feature
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
Not available
Skin conductance (EDA)
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 clearances
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

Accelerometer
Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026
Accelerometer range
Not available
Gyroscope
No12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026Versa 4 column explicitly lacks the gyroscope.
Barometric altimeter
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
No12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026Versa 4 column explicitly lacks the compass.
Ambient light sensor
Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026
Depth gauge
Not available
Depth gauge range
Not available
Water temperature sensor
Not available

Health and fitness

Health features
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 features
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 profiles
Not available
Dive modes
Not available
External sensors
Not available

Safety

Fall detection
No12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026Versa 4 column explicitly lacks general fall detection.
Car crash detection
No12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026Versa 4 column explicitly lacks car crash detection.
Emergency SOS
No12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026Versa 4 column explicitly lacks manual emergency SOS.
Emergency siren
Not available
Live location sharing
Not available
Dedicated LED flashlight
No14Spec databasegadgetsandwearables.com/technical-specs/fitbit-versa-4Read 7 October 2026Explicit absence of dedicated LED flashlight. Display illumination is not that hardware feature.

Positioning

Positioning
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 GNSS
Not available
Offline maps
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

Bluetooth
Not available
Bluetooth version
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-Fi
Not available
Wi-Fi standard
Not available
Wi-Fi bands
Not available
Cellular
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
4G bands
Not available
5G bands
Not available
NFC
Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026
Contactless payments
Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026
Payment services
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
No12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026Versa 4 column explicitly lacks UWB radio.
Satellite
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

Audio

Speaker
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
Calls 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 watch
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

Buttons
11Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Navigate Versa 4: color AMOLED touchscreen display and 1 button.
Named operating buttons
Button1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Maker calls the single operating control Button. Strap-release latches are excluded.
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 bezel
Not available
Gestures
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

Battery capacity
Not available
Claimed battery life
ModeWith solarHours (h)
SmartwatchNo144
Always-onNo72
GPSNo12
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)
144h
AOD battery life (up to)
72h
GPS mode (claimed)
12h
Solar charging
Not available
Charging method
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 guidance
Not available
Max charging power (watch)
Not available
Fast charging
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 claim
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)
Not available
Full charge time (claimed)
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

Peak brightness (measured)
Not available
Battery life (measured)
Not available
Battery tests (measured)
Not available
Full charge time (measured)
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

Lug width
Not available
Quick-release strap
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 system
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 material
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
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 sizes
SizeWrist (min) (mm)Wrist (max) (mm)
Small140180
Large180220
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

FCC ID
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)
Not available
SAR limb (EU)
Not available
Other certifications
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

In the box
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 box
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.

Warranty

Manufacturer warranty (source market)
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.

Compare with

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Variants

Each variant lists only what differs from the specs above.

Model numberGTIN / EANMarketsColours
FB523BKBK-US810073611450USBlack / Graphite Aluminum
FB523SRAG-US810073611474USWaterfall Blue / Platinum Aluminum
FB523RGRW-US810073611481USPink Sand / Copper Rose Aluminum
FB523RGRD810038858746EEBeet Juice / Copper Rose Aluminum

Sources

We read 19 sources for this smartwatch. The numbers match the markers in the sheet.

  1. Read 7 October 2026Backs 38 fields
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  19. Read 7 October 2026Backs 4 fields

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