After a couple minutes, insert one corner of a plastic card underneath the far right battery cell, starting from the front edge.

This shouldn't require much force. If you have trouble, apply more adhesive remover and give it 2-3 additional minutes to penetrate.

Try not to deform the battery. A damaged battery can leak dangerous chemicals and/or catch fire.

Wiggle the card from side to side and slide it all the way under the battery cell.

Lift to fully separate the adhesive, but don't try to remove the battery cell yet.

Leave the plastic card temporarily underneath the cell to prevent it from re-adhering while you continue.