Follow each step carefully.
Press and hold the power button until the power off slider appears. Slide to power off.
Use a Pentalobe screwdriver to remove the screws securing the back cover. Carefully lift the cover off.
Use a plastic spudger to gently pry up the battery connector from the motherboard.
Carefully pull the battery adhesive strips from the battery to loosen it.
Gently lift the battery out of the enclosure, ensuring no connectors are damaged.