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Who here has made a DIY power bank yet? I'm trying to make a power bank (image for illustrative purpose only) that will use 18650 batteries (3s3p or 3s4p)I just wanna know
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Colorful 18650 Lithium Ion Battery cell on a wooden table known for use with vape or e cigarette. Also used to make laptop battery and power bank. Wit Stock Photo - Alamy
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