Do a battery Celibiration Use the smartphone until it reaches 5%, and make sure your phone isn't connected to the charger. Open the phone dialer app and enter the following code: *#0228#. A pop-up menu appears with an option that says 'Quick Start'. Press 'Quick Start" and then press 'OK. Wait for the display to power back on again and check if the battery percentage has gone down. Charge the phone to 100% again. Power the phone off and then turn it on again and then unplug the charger. Repeat these steps 2, 3 times Plug the charger in again and the battery at 100%, turn the phone on again and open the dialer, and type: *#9900#. Scroll down to "batterystats.bin reset" and tap. Exit the menu and restart the phone.
