The battery is held in place with light adhesive.

Place the flat end of a spudger in the small gap between the plastic frame and the battery, opposite to the display cable.

Carefully lever the battery up and out of its recess.

Take care not to puncture or bend the battery with your tool—a punctured or bent battery may leak dangerous chemicals or cause a thermal event.

Don't try to remove the battery completely yet, as its connector is still adhered to the core assembly.