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How do I charge my tracker?

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We recommend plugging your charging cable into a USB port on your computer or other low-energy device. If necessary, you can use a UL-certified USB wall charger. Don't use a USB hub or battery pack to charge, and only use the charging cable that came with your tracker.

Your Fitbit Alta™ comes equipped with a rechargeable lithium-polymer battery. If your battery is low, charging fully may take one to two hours. Watch our video or read the instructions below for more detail.

Charging your Alta (video)

Charging your Alta (step-by-step)

To charge your Alta:

  1. Plug the charging cable into the USB port on your computer.
  2. Plug the other end of the cable into the port on the back of the Alta.
  3. By lining up the pins on the charging cable with the port on your Alta, attach the cable to the tracker. These must be securely locked in place.
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  4. To verify that charging has started, make sure you see a battery icon on Alta's display. When you disconnect your charging cable from your tracker, you'll see a message letting you know the tracker is no longer plugged in.

To help you pick a good time for charging, note the following:

  • If one day or less of battery life remains, when you flip through your stats you'll see a battery icon on the first screen.
  • You can't flip through stats when the battery is critically low. You'll see a warning and should charge as soon as possible.
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  • You can receive a push notification on your mobile device or an email when your battery is low. To choose your preference, go to the Notifications of your fitbit.com dashboard settings.
  • You can see your battery level at any time on your Fitbit dashboard. You can also show the battery indicator on your tracker. For more information, see How do I change the stats on my tracker?

Your Fitbit Blaze™ comes equipped with a rechargeable lithium-polymer battery. If your battery is low, charging fully may take one to two hours.

Watch our video or read our written instructions below.

Charging your Blaze (video)

Charging your Blaze (step-by-step)

To charge your Blaze:

  1. Plug the charging cable into the USB port on your computer.
  2. Remove the tracker from the wristband. To do so, push the screen gently so that it detaches from the frame.
  3. Put the tracker inside the charging cradle with the screen facing towards you and the four gold prongs aligned.
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  4. Close the cradle cover.
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  5. Look for a large battery icon that appears temporarily on the display to let you know that charging has started. It gives an indication of how low your battery is to start, and a small battery icon remains in the top left corner while charging so you can check progress. A large green battery icon means the battery is full.
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To help you pick a good time for charging, note the following:

  • The top left of your Blaze screen shows a battery icon that represents the charge level at the last time you synced.
  • You can also see your battery level at any time on your Fitbit dashboard.
  • You can receive a push notification on your mobile device or an email when your battery is low. To choose your preference, go to the Notifications of your fitbit.com dashboard settings.

Your Fitbit Charge™ comes equipped with a rechargeable lithium-polymer battery. To see your battery level, check your Fitbit dashboard.

To charge your Fitbit Charge, plug the charging cable into the USB port on your computer and plug the other end into the port on the back of the Charge. A battery icon on the display will show the charging progress. Charging completely takes between an hour and two hours.
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Your Fitbit Charge HR™ comes equipped with a rechargeable lithium-polymer battery. To see your battery level, check your Fitbit dashboard.

To charge your Charge HR, plug the charging cable into the USB port on your computer and plug the other end into the port on the back of the Charge HR. A battery icon on the display will show the charging progress. Charging completely takes between an hour and two hours.


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Fitbit Flex™ comes equipped with a rechargeable battery. To charge your tracker:

  1. Remove your tracker from the wristband: 
  2. Insert your tracker into the charging cable. Line up the tracker with the charging cable, putting the rounded end of the tracker into the charging cable at a slight angle. Use your thumb to push the tracker in and down into the charging cable until you hear a click.

  3. Insert the charging cable into the USB port on your computer.
  4. Your Flex's LED indicator lights will pulse to show the battery level every few seconds.
    Each solid indicator light represents progress towards the total charge. It may take up to 3 hours to fully charge your Flex. When it's charged, all 5 indicator lights will blink.
  5. You can then take your tracker out of the charging cable and insert it into your wristband. 

To charge your Fitbit One™, align the gold contacts on your tracker with the gold contacts on the inside of the charging cable, then plug it into your computer’s USB port. Charging typically takes about an hour.

A battery indicator will appear when the Fitbit One is first plugged into the charging cable. You can hold down the tracker’s button while it is charging to see its current battery level. You can also see your One tracker's battery level at the time of your last sync by clicking on the gear icon in the upper right corner of your dashboard.

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Your Fitbit Surge™ comes equipped with a rechargeable lithium-polymer battery.

To charge your Surge, plug the charging cable into the USB port on your computer and plug the other end into the port on the back of the Surge. Charging completely takes one to two hours.


Plugging charging cable into back of Surge

Battery level is shown at the top left of the Menu. You can also check your battery life on your Fitbit dashboard.

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Last updated: May 16, 2016
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