Introduction
The 3.7V/3, 200mAh Li-Poly battery is a key component because it stores the power within the device. If it burns out, it must be replaced.
Tools
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            Using the Phillips #1 screwdriver, remove the 2mm screw located on the bottom of the device, near the hinge. 
 
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            Using the plastic opening tools, gently pry open the side of the large panel. 
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            Keeping the tool in, slowly slide the tool along the side of the panel. 
 
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            Rotate the device 180 degrees. 
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            Gently slide the plastic opening tool along the side of the panel. 
 
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            Using both hands, slowly pull apart the back panel from the rest of the device. 
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            Gently flip the back panel open so the circuit board faces up and the two panels are side by side. 
 
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            Softly pinch the red and blue wires close to the white connector. 
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            To pull the wires out, wiggle them back and forth until the connector is fully out. 
 
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To reassemble your device, follow these instructions in reverse order.