If your bottom interconnect cable is still taped down, remove the tape now.

Lift the battery out its recess and remove it.

During reassembly, if your adhesive is still intact and sticky, you can reuse it. Otherwise, follow this guide to replace the adhesive with custom cut strips.

If you don't have custom cut adhesive strips, use double-sided tape, like Tesa Tape, to secure the battery to the frame.