If you successfully removed both adhesive strips, move on to the next step. Otherwise, you will need to pry the battery from the rear case.

Prepare an iOpener and apply it to the back of the rear case, directly over the battery. Alternatively, you can apply heat using a heat gun or hair dryer.

After about a minute, remove the iOpener, flip the phone over and use a plastic card to break up any remaining adhesive behind the battery.

Avoid bending the battery. Damage to the battery may release dangerous chemicals, and could start a fire.

Do not pry under the top third of the battery, you may damage the volume button ribbon cable.