If the battery is swollen, take precautions before proceeding.
Calibrate your new battery:
Discharge the battery below 25% to prevent explosion or fire.
Remove all thirteen 3.4mm Phillips #00 screws from the midframe.
Insert metal spudger or plastic opening tool into gap and gently pry open outer cover.
Use the flat end of a spudger to release the battery connector from the logic board.
Prying force may cause battery puncture or damage.
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