Introduction
If your JBL 2 speaker isn't working correctly or delivering the high-quality sounds you expect, you may need to replace the battery. Replacing the battery can breathe new life into your device.
Tools
Parts
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            Remove the rubber rings from either end of the device. 
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            If there is difficulty in lifting the rings from the device, use the metal spudger. 
 
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            Remove the four 4.8mm Phillips #1 screws from each end of the device with the Phillips head screwdriver. 
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            Lift the end pieces off of the device. 
 
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            Peel one end off and slowly draw it across the length of the device until you get to the other side. 
 
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            Remove the four 7.9mm Phillips #1 screws along the black centerpiece of the device between the camera and the auxiliary port. 
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            Lift up the casing and circuit board but do not try and remove the ribbon wires. 
 
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            Remove the cover from the end that the ribbon wires are attached to. It should peel off easily. 
 
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            Unlatch the mechanism holding the ribbon wires in place, then disconnect them from the motherboard. 
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            To access the wires, remove some of the black glue holding them in place with the spudger. 
 
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            Remove the four 7.9mm Phillips #1 screws around the edges of the center piece. 
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            Slide the outer casing off away from the auxiliary and micro USB port. 
 
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            Use the angled tweezers to disconnect the battery from the motherboard. It will take some work to remove this piece. 
 
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            Use the spudger to reach under the sides of the black centerpiece to access the six latches, three of which are on each side. 
 
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To reassemble your device, follow these instructions in reverse order.