18650 recharger and 7000 mAh power bank
Free     Myminifactory     Henry Wang

18650 recharger and 7000 mAh power bank

Two months ago I designed a small tool to collect the energy from the used battery They may still have more than 70 energy inside even you cannot use them for normal cases This simple device can rise the small voltage to 5 V which can be ...

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