Use the exposed clear plastic pull tab to peel the battery off the adhesive securing it to the iPhone.

If you are having trouble peeling the battery up or if the tab breaks, apply a few drops of high concentration (over 90%) isopropyl alcohol under the edge of the battery.

Wait about one minute for the alcohol solution to weaken the adhesive. Use an opening tool to gently lift the battery by its edge.

Don't try to forcefully lever the battery out. If needed, apply a few more drops of alcohol to further weaken the adhesive. Never deform or puncture the battery with your pry tool.

If there's any alcohol solution remaining in the phone, carefully wipe it off or allow it to air dry before installing your new battery.

If you still have trouble peeling the battery up, use an iOpener or hair dryer to heat the rear case of the iPhone and soften the adhesive.

Overheating the iPhone may ignite the battery.