Start to slide a plastic card under the bottom right corner of the battery to cut the adhesive.

Slide the plastic card along the right side of the battery to further release the adhesive. Gently start to pry up the battery while doing so.

If you have trouble prying up the battery, the adhesive may not be loose enough. You can apply some isopropyl alcohol under each corner of the battery and allow it to penetrate for about two minutes to help weaken the adhesive.