Introduction
Tools
Parts
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Use your thumb to move the tab to the right that releases the battery, while using your other hand to slide the battery out.
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The battery will come out straight toward you.
 
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After removing the battery, loosen the screw that secures the access panel to the computer. Then, lift up the access panel at an angle and remove it from the computer.
 
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Disconnect the coin-cell battery cable from the system board.
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Slide the coin-cell battery from its socket.
 
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                            Conclusion
                          
                          With you new battery, reassemble your device by performing the instructions above in reverse order.