It’s essential to have a good grasp on the health of your phone battery, whether it be the number of charging cycles, its actual capacity, or its temperature. Even batteries in the best smartphones ...

Are you worried that your battery is starting to die and may need to be replaced? Are you looking for a used laptop and want to make sure that the battery is in reasonable condition before you buy?

If your phone battery dies by afternoon, a few simple setting changes can add 3–5 extra hours. From screen brightness to ...