Introduction
It is vital to take the back cover off in order to replace any of the internal pieces of the device.
Tools
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            Find the arrow on the battery cover on the back of the device. 
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            While pressing down on the arrow, slide the cover towards the bottom of the recorder until it clicks. 
 
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            Remove the battery cover by first tilting it so it is at a right angle with the rest of the device. 
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            Next, twist it to the side as shown in the second picture. The lid should simply snap off. 
 
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            Use a #00 Phillips head screwdriver to remove the four (1.7x16 mm) screws from the back case. 
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            Next, use the same screwdriver to unscrew the (1.7X5 mm) screw, which is located inside the battery compartment. 
 
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            With a firm grip on the larger half, remove the back cover by lifting first on the battery area. 
 
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To reassemble your device, follow these instructions in reverse order.