Pull up on the suction cup with a steady force to create a gap between the bottom edge of the battery and the frame.

Take care not to bend the battery—a bent battery may leak dangerous chemicals or cause a thermal event.

If the battery does not appear to be separating from the frame, apply a few more drops of isopropyl alcohol and wait two minutes before trying again.

The adhesive underneath the battery is strong. You might need to apply isopropyl alcohol and pull up on the suction cup multiple times to loosen the battery.