★ Also works without root access ★
To get the most out of your battery you should calibrate your device each time after installing a new ROM or when you notice it got decalibrated (which could happen after a few months).

This is the easiest way to calibrate your device: follow the steps on screen and you'll have your battery calibrated in no time!

For optimal results use this app with Root Access. If your device is Stock this app will still help the Android System to calibrate your battery.