It takes time and constant tension to release the adhesive strips. Be patient and don't yank on them.

Don't let the strips touch the bottom edge of the frame—it's sharp and can easily cut them.

Use your fingers to slowly pull each strip out at a low angle, giving the adhesive plenty of time to stretch and detach.

Re-grip the strip closer to the battery as necessary and continue pulling—the adhesive will stretch a lot.

If a strip or its pull tab breaks off, use blunt nose tweezers to try to retrieve it from under the tray. If you can't reach it, move onto the next tab.