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. Otherwise, you can apply heat using a heat gun or hair dryer.

Then, use a plastic opening tool to gently lift the battery.

Overheating the iPhone may ignite the battery.

Alternatively, a piece of dental floss may be used to separate the battery from the rear case. A stronger alternative to dental floss is an unwound guitar string, such as a 0.009 E string from a 12-string set.

Thread the floss or string behind the upper battery corners, bring the ends together, wrap them around a folded cloth, and pull evenly.