Apply a suction handle to the center of the battery.

Brace the top and bottom of the device against your work surface with one hand and firmly pull up on the suction handle with the other.

The adhesive takes time and repeated pulls rather than strong force to loosen. Pull on the suction cup with steady force for 15 seconds at a time.

If the battery doesn't loosen, apply 1-2 drops of isopropyl alcohol along the top, left, and right edges, wait a minute, and pull again.

When the battery begins to lift from the device, proceed to the next step.