Don't crease or bend the battery—it can leak dangerous chemicals and/or catch fire.

The adhesive securing the battery is very strong. Separating it requires time and constant pressure. It will most likely take multiple rounds of heat and isopropyl alcohol.

Firmly secure your phone with one hand.

With your free hand, pry the battery up with the pick. Maintain constant pressure on the pick until the battery separates from the frame.

If after two minutes of constant pressure the battery doesn't budge, apply more heat and isopropyl alcohol and try again.