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Oh s..t... I have not told about it. I use standard li-ion microUSB charger, it is hiden between side wall and back.Today this speaker has bigger up to 30W speaker with 15W amp + tweeter on the top (different one than this one int the post with grill). Of course it needs more power so I use double 3.2v to 12v booster and 3 cells 18650. Have a nice day!
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