Charge 5SKU: FB421BKBK-FRCJK
Meet our most advanced fitness & health tracker with tools like an on-wrist ECG app for heart health,** EDA Scan app for stress management and more. Get a 6-month membership of Fitbit Premium*** and optimize your routine with Daily Readiness Score.
Fitbit ECG (Electrocardiogram) App
EDA (Electrodermal Activity) Scan App
Stress Management Score
Oxygen Saturation (SpO2) Monitoring
Heart Rate Variability
Skin Temperature Tracking
Sleep Score & Sleep Stages
Menstrual Cycle Tracking
Health & Wellness Reminders
Daily Readiness Score
Active Zone Minutes
24/7 Heart Rate Tracking with PurePulse®
Workout Intensity Map
20 Exercise Modes
All-Day Activity Tracking
Cardio Fitness Level
Google Fast Pair
Do Not Disturb Mode
Up to 7-Day Battery Life
Vibrant Color Display
Always-On Display Mode
- Fitbit Charge 5
- Infinity band (small & large)
- Charging cable
Sensors & Components
Optical heart rate monitor
- 3-axis accelerometer
- Built-in GPS + GLONASS
- Red and infrared sensors for oxygen saturation (SpO2) monitoring
- Device temperature sensor (skin temperature variation available in the Fitbit app)
- Vibration motor
- Ambient light sensor
- Radio transceiver: Bluetooth
- Multipurpose electrical sensors compatible with ECG app & EDA Scan app
Battery & Power
- Battery life of up to 7 days. Use of the always-on display and SpO2 features will require more frequent charging. We recommend charging your tracker every few days to ensure you are always tracking.
- Battery type: Lithium-polymer
- Charge time (0-100%): Two hours
- Saves 7 days of detailed motion data, minute by minute
- Saves daily totals for the last 30 days
- Stores heart rate data at 1 second intervals during exercise tracking and at 5 second intervals all other times
Water resistant to 50 meters. After getting the band wet, we recommend drying the band because, as with any wearable device, it's best for your skin if the band is clean and dry. Learn more.
Give your wrist a rest by taking the band off every now and then. If the band gets wet or you sweat in it, remove and completely dry the band before putting it back on. Learn more.
The Charge 5 housing is made of aluminum, glass and resin. The band is made of silicone and has an aluminum buckle.
Like all heart rate tracking technologies, accuracy is affected by physiology, location of device and different movements.
- Operating temperature: 14° to 113°F
- Maximum operating altitude: 28,000ft
The Fitbit app is compatible with most popular phones. To set up and use your Fitbit products and services, you must install the Fitbit app on a compatible device running one of the following operating systems:
- Apple iOS 12.2 or higher.
- Android OS 8.0 or higher. See additional tips for Android phones here.
Syncing range: Up to 30ft
- Certain features like smartphone notifications may require Android 8.0+. Check your device compatibility.
- Syncing requires Bluetooth® LE and internet connection.
- Syncs with Mac OS X 12.2 and up, iPhone 5S and later, Android 8.0 and later.
Print this guide to find the right size for you. Both small and large sizes included in box.
Small: Fits wrist 5.1" - 6.7" in circumference
Large: Fits wrist 6.7" - 8.3" in circumference
- Viewing area: 1.04" diagonal
- Screen height: 0.86"
- Screen width 0.58"