Introduction
This guide lists instructions for replacing the battery in the Sanyo SCP-8100. Taking out and replacing the battery is also a method of resetting the phone which may be helpful for troubleshooting problems. No tools are required.
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            Push and hold the button on the back toward the direction of the arrow to unlock the battery. 
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            Lift and remove the battery from the back of the phone. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.