Remove the battery.

During reassembly, remove the old adhesive with tweezers and isopropyl alcohol.

If there are any drops of isopropyl alcohol remaining, use a lint-free cloth to wipe them away or allow the iPad to air dry before installing a new battery.

Apply stretch-release adhesive strips, double sided adhesive tape, or pre-cut adhesive to secure the new battery.

Don't reuse the battery after it has been removed, as doing so is a potential safety hazard.