To restart a Fitbit Charge HR, simply connect its power cable and then hold in the device's lone button for a little more than 10 seconds. When the Fitbit logo and some numerical data appear on ...

But should you want to turn off a Fitbit Charge HR, whether to save battery, to comply with security regulations, or because you simply don't want it tracking you for a while, you can force a ...

When it comes to cardiovascular health, the Fitbit Charge does pretty well. It only slightly overestimates VO2 max and slightly underestimates heart rate (HR), but becomes more accurate with ...