Introduction
This guide is to replace a weak or non-functional battery.
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Hold the phone with the back side facing you.
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Press down on the silver tab towards the bottom end of the phone.
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Carefully lift up the back casing to reveal the battery.
 
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Put your finger on the top left corner of the battery and lift the battery up and out of its housing.
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The phone should now look like this.
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.