Remove the battery.

Do not reuse the battery after it has been removed, as doing so is a potential safety hazard. Replace it with a new battery.

To install a replacement battery:

Remove the old adhesive from the phone frame.

Apply new adhesive in the same general area as the old adhesive.

Lay the battery lightly in place. Check that the battery connector is properly aligned with its motherboard socket.

Press the battery firmly into the phone for thirty seconds.