The daughterboard interconnect cable runs beneath the right side of the battery, as shown in red. Avoid prying in this area.

Insert a spudger beneath the top left corner of the battery and carefully pry it out. You can also use an old gift card or credit card.

If you can lever the battery to the right and remove it, do so, otherwise cut the remaining adhesive on the left side. Then repeat the procedure on the right side of the battery, avoiding the cable area.