Apply a suction cup to middle of the battery.

Pull up on the suction cup with strong, steady force to separate the battery from the frame.

Insert an opening pick into the gap between the battery and the frame.

Continue to pull up on the suction cup with a strong, steady force while sliding the opening pick back and forth to slice the adhesive.

Continue this process until the battery separates from the frame, applying a few drops of alcohol as necessary.