Introduction
This is a prerequisite-only guide! This guide is part of another procedure and isn't meant to be used alone.
Tools
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Remove the 11 Phillips screws securing the lower case:
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Seven 11.6 mm screws
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Two 14.6 mm screws
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Two 6.1 mm screws
 
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Continue sliding the opening pick along the perimeter of the lower case to release the remaining clips.
 
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Use the flat end of a spudger to push each side of the battery connector until it comes out of the socket.
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.