Insert an opening pick into the gap long the left side of the battery.

Use the opening pick to slice the remaining adhesive at the top and bottom of the battery.

Avoid scraping the two flex cables under the battery with your opening pick.

This may be difficult as the adhesive is strategically located between the cables and the battery tray. A possible solution is to cut a plastic card to fit between the flex cables and battery tray edge.

Do not bend the battery.

Avoid the earpiece contact pins located near the top left corner of the battery as you pry up with your opening pick.

If you cannot pry the battery up, add a few more drops of isopropyl alcohol to the adhesive. A plastic card can also be helpful during this process.