The JBL Charge 4 is a waterproof, Bluetooth capable speaker that additionally functions as a portable charger for smartphones. It is identifiable by its model number: CHARGE4S.
Have you tried taking a look on ebay? If all else fails, you could try buying a for parts not working item. Also, is your device still under warranty? It is possible you may be able to replace the entire unit in the event that it cannot be repaired.
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