Fitbit Charge 3 SE fitness tracker Graphite/White Special Edition, water-resistant, 7-day battery

The Fitbit Charge 3 SE is a slim, water-resistant activity tracker that monitors 24/7 heart rate, records sleep stages, tracks 15+ workouts, and delivers smartphone notifications while offering up to seven days of battery life.

Compact and wearable all day, the Charge 3 SE combines continuous heart-rate sensing, automatic sleep stage detection and multi-sport tracking in a lightweight band. Built to be swim-ready and paired to your phone’s GPS, it’s designed to give visible metrics for daily steps, active minutes and workouts without needing frequent charging.

How accurate is the Charge 3 SE for heart rate and calorie tracking?

The device uses continuous optical heart-rate monitoring to estimate exertion and calorie burn through the day and during workouts. While it provides useful trends and comparisons, readings are best seen as estimates and can vary with fit and activity type.

• 24/7 PurePulse optical heart-rate sensor for resting and active rate trends
• Estimated calorie burn calculated from heart rate, activity and personal profile
• Improved data when worn snugly and during steady-state exercises

What workout and outdoor tracking features does it offer?

Charge 3 SE supports over 15 exercise modes like running, cycling, swimming, yoga and circuit training, showing real-time stats on the tracker screen. For outdoor workouts, it pairs with your smartphone GPS to display pace and distance in real time while storing a synced map and details in the Fitbit app.

• 15+ exercise modes with live stats for goals and intervals
• Smartphone GPS connection for accurate outdoor pace and distance
• Automatic exercise recognition to capture workouts you forget to start

Can I swim with the Charge 3 SE and what about sleep tracking?

The Charge 3 SE is water-resistant to 50 meters, so it tracks swims and can be left on in the shower or pool. For sleep, it automatically detects time spent in light, deep and REM sleep stages and aggregates trends in the Fitbit app to help you review nightly patterns.

• Water-resistant to 50 meters — suitable for pool and open water swims
• Auto sleep-stage detection (light, deep, REM) without manual setup
• Syncs trends and insights to the Fitbit app for weekly and long-term views

What connectivity, battery life and daily convenience features are included?

Connect the band to your smartphone to receive call, text and app notifications on your wrist and use built-in apps like weather. The battery lasts up to 7 days under typical use, helping you spend less time charging and more time tracking activity and sleep.

• Smartphone notifications for calls, messages and compatible apps
• Up to 7 days of battery life, varying with use and settings
• Includes both small and large silicone bands for a one-size fit

Who this is for: The Fitbit Charge 3 SE fits people who want a streamlined, reliable fitness tracker without a bulky watch—ideal for swimmers, runners and everyday users who value continuous heart-rate insights, multi-day battery life and discreet smartphone alerts. If you want a wearable that captures daily activity, sleep stages and workout metrics while remaining comfortable and water-ready, this model is a practical choice.