Slowly slide an plastic card under the bottom left battery cell to separate it from the frame.

Take care not to puncture or bend the battery with your tool—a punctured or bent battery may leak dangerous chemicals or cause a fire.

If you're having difficulty separating the adhesive, apply more high concentration (>90%) isopropyl alcohol and wait for the adhesive to loosen.

Alternatively, you can use dental floss to slice through the adhesive. Wrap the floss around a bit driver handle or your fingers and thread it back and forth under the battery.