Introduction
If you can no longer use your Azpen A740 tablet because the battery no longer holds a charge or has malfunctioned, and you cannot use your device as a result, use this guide to replace the battery.
Before beginning this repair, power off your device and unplug from the charger.
Tools
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            Use the set of plastic opening tools to separate the inner backing from the electronics. 
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            Use the Phillips screwdriver to remove the 3.8 mm screws, holding the inner backing of Azpen A740 Tablet. 
 
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            Disconnect the black, red, and grey wires leading to the battery from the motherboard using a soldering iron. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.