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3. Using the navigation tabs on the left, find Personal Info.
4. Find an option to create a custom heart rate zone and then specify the
minimum and maximum heart rate for your custom zone.
5. Sync your Fitbit Charge HR to update your tracker with the new setting:
a. Click the Fitbit Connect icon located near the date and time on your
computer.
b. With your Fitbit Charge HR nearby, click Sync Now.
At any time you can check your dashboard to see the amount of time you’ve spent in
your custom zone.
For more details about heart rate tracking, including links to relevant American Heart
Association information, see our “Heart rate FAQs” article on https://help.fitbit.com.
Battery life and charging
Your Fitbit Charge HR contains a rechargeable lithium-polymer battery.
With normal use, your fully charged Fitbit Charge HR should last up to five days
before needing a charge. You can check the level of your battery by logging into
fitbit.com and clicking the gear icon on the top-right corner of the page.
When you press the button on your Fitbit Charge HR to cycle through your stats, the
first screen will show a low battery icon if there is approximately one day or less of
battery life remaining.
If you want to receive a mobile notification or email when your battery is low:
1. Log in to your fitbit.com dashboard.
2. Click the gear icon in the top-right corner of the page and select Settings.
3. Using the navigation tabs on the left, find Notifications and choose which ones
you would like to receive.
4. Click Save.
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