Introduction
Use this guide to replace an old or faulty battery. If your battery is swollen, take extra precautions.
What you need
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Remove the following ten screws securing the lower case to the upper case:
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Seven 3 mm Phillips screws.
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Three 13.5 mm Phillips screws.
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Using both hands, lift the lower case near the vent to pop it off two clips securing it to the upper case.
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Remove the lower case and set it aside.
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Tool used on this step:P6 Pentalobe Screwdriver 2009 15" MacBook Pro Battery$5.49
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Three Pentalobe screws secure the battery to the upper case. They can be removed with this special driver.
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Use the tip of a spudger to bend back the finger of the "Warning: Do not remove the battery" sticker while you remove the five-point Pentalobe screw hidden underneath.
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Lift the battery by its plastic pull tab and slide it away from the long edge of the upper case.
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Tilt the battery back enough to access the battery cable connector.
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Pull the battery cable connector away from its socket on the logic board and remove the battery from the upper case.
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