Plug the charging cable into a USB port on your computer, a UL-certified USB wall charger, or another low-energy device. Attach the other end of the cable to your Fitbit device. Charging your device to 100% may take 1-2 hours.
For troubleshooting steps, see Why isn't my battery charging?
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How do I attach the charging cable to my Fitbit device?
Fitbit devices come equipped with a rechargeable lithium-ion battery.
How do I know when my device is charged to 100%?
While your watch or tracker charges, press the button or tap to see the battery level.
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A solid battery icon appears when your device is charged to 100%.
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A solid battery icon with a smile appears when your device is charged to 100%.
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A green battery icon appears when your device is charged to 100%.
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A solid battery icon appears when your device is charged to 100%
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A solid battery icon with a smile appears when your device is charged to 100%.
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While Flex 2 charges, each white light represents 25% of the maximum charge. When the tracker is charged to 100%, a green light appears, and then all 5 lights shine for a few seconds before turning off.
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While Flyer charges, the LED changes color depending on the current charge level. Use the following table to determine the current battery level when Flyer is plugged into the charger:
LED color | Battery status |
White light | Fully charged |
Yellow light | Medium |
Red light | Low |
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While the watch charges, tap the screen twice to check the battery level. Tap again to use it while it charges.
How do I check the battery level on my Fitbit device?
Swipe down on the Today tab

of the Fitbit app to see your battery level in the top left corner, or see your battery level on most devices.
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- When 1 day or less of battery life remains, a battery icon appears on your device as you tap through your stats.
- When a critically-low battery warning appears, charge your device as soon as possible.

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Press and hold the button on your device to see the battery level on the quick settings screen.
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The battery icon in the top left of your device’s screen shows the remaining battery life as of the last sync.
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See your battery level on the battery screen on your tracker. To see this screen, turn on the battery menu item in the Fitbit app.
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Swipe up on your clock face. The battery icon is in the top left of the screen.
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- If your device’s battery is low, a flashing red light appears after you check your goal progress.
- When your device’s battery is critically low, a flashing red light appears instead of your goal progress.
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- When turning Flyer on or off, check the battery-level indicator light to view the current battery level.
- When turning Flyer on or off, listen for the audio notification telling you the current battery level.
- While Flyer is on, briefly press the Power button to see the battery indicator LED and hear an audio notification.
- Check Flyer's battery level on any device it's connected to, if your device supports this feature.
- When Flyer's battery level falls to Low or Very Low, the LED changes to red and an audio notification plays.
Use the following table to determine the current battery level when Flyer is unplugged:
LED color | Battery status |
White light | Medium to fully charged |
Red light | Low |
Flashing red light | Very low |
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Swipe down from the top of the screen. Wait 2 seconds for the control center to disappear. The battery level icon is in the top left.
What are some tips for charging my Fitbit device?