20000 mAh Powerbank
ATTENTION: Strictly avoid short circuit and wrong polarity !!! Part list: DIY powerbank modul 2.4A (e.g. from ebay) 4 Samsung INR21700-50E (21700, 5000 mAh) 4 hex screws M3 x 6 4 insert nuts M3 x D4 x L5 1 m flexible cable 0,75 - 1 mm² 2…
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