Try to keep the strips flat and unwrinkled during this procedure; wrinkled strips will stick together and break instead of pulling out cleanly.

Slowly pull one of the battery adhesive strips away from the battery, toward the bottom of the iPhone.

Pull steadily, maintaining constant tension on the strip as it slips out from between the battery and the rear case. For best results, pull the strip at a 60º angle or less.

Guide the strip carefully around the corner and up the side of the battery. Be careful not to snag it on any of the other internal iPhone components.

The strip will stretch to many times its original length. Continue pulling, re-grabbing the strip near the battery if necessary, until the entire strip comes free.