To restart a Fitbit Charge HR, simply connect its power cable ... Press and hold the button for two seconds. 3. Once the battery icon appears, release and then immediately press the button again ...

The Charge HR from market leaders Fitbit, however ... This, to be fair, is presumably to conserve battery life, which clocks in at about four days. The Jawbone Up3 also has a heart rate monitor ...

In this case, all you can really do is wait for Fitbit to resolve the issue. Alternatively, you can try restarting your smartphone and Charge 6. The Charge 6 battery ... Fitbit app icon on your ...