While lifting the plastic frame out of the way, push one corner of your plastic card underneath the outside edge of the first center battery cell.

Do not pry along the edge nearest the battery connector, or you risk damaging the keyboard ribbon cable.

Underneath the center battery cells, a thin metal plate protects the trackpad. Pry only under the battery cell; leave the metal plate in place.

Slide your card all the way under the battery cell, and leave it to prevent the battery cell from re-adhering.