Apply a suction cup to the battery, as close to the center of the right edge as possible.

Insert an opening pick between the right edge of the battery and the frame.

Pull on the suction cup and pry the battery upward.

Don't use excessive force on the battery. Slow, consistent pressure is all that is required to free it from the frame.

Use two opening picks, side-by-side, if the first pick does not provide enough leverage, like this.

Remove the battery from the frame.

Don't reinstall a damaged or deformed battery, as doing so is a potential safety hazard.

Use this guide to install a battery with custom-cut adhesives, or use this guide to install a battery with an adhesive sheet.