These actions make sense only after changing the regular battery with a new one, or after years of using the old one.Requires Root . So. Charge your phone in theswitched condition with new battery at least 4 hours Not paying attention to the display "Battery full" . After 4 hours, without disconnecting the charging, run the program В® Battery Calibration and in the window that opens, we press "Battery Calibration". All we disconnect the phone from the charging, reboot and enjoy. Applicable for a Root phones and battery capacity of not more than 2000 mAh