Caution: Don't jab the battery with any sharp tools. A punctured battery may leak dangerous chemicals or catch fire.

Use the flat end of a spudger to gently lift up the edge of the top right battery adhesive pull-tab so that you can grab it with a pair of blunt tweezers.

Peel down the battery adhesive pull-tab to un-stick it from the top edge of the battery.

Repeat for the top left battery adhesive pull-tab.