homemade power bank

what is a power bank? power bank is a battery pack. which take self charge and give charge other devices. A lithium battery is the best a powerful powerBank. 6000mpr power bank is a material which save energy for charge another device. I making a powerbank some lithium battery and a power bank circuit. power Bank circuit easy to buy anywhere. you also can make power bank with watching this video carefully. I hope you like my video. you can watching my another video on my channel. thank you very much for or your activity. if you not subscribe yet my channel please subscribe my channel to inspire. thank you very much.
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