Use the edge of an iPod opening tool to peel the adhesive under the battery that secures it to the logic board.

Flip the battery upwards to reveal the solder pads soldered to the logic board.

Desolder the battery from the logic board by heating up the solder joint with a soldering iron and simultaneously using a pair of tweezers to pull the battery wire away from the logic board.

If you have never soldered before, we have a guide that makes it easy.