Slide an opening pick under the bottom edge of the battery to slowly pry it up from the case.

The battery is held in place by strong adhesive. To help with removal, you can apply a heated iOpener on the battery for a minute. Alternatively, apply some isopropyl alcohol under each corner of the battery and allow it to penetrate for several minutes to help weaken the adhesive.

Try your best not to deform the battery during this process. Soft-shell lithium-ion batteries can leak dangerous chemicals, catch fire, or even explode if damaged. Do not use excessive force or pry at the battery with metal tools.