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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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21PCS 18650 Battery Power Bank Case DIY Powerbank Welding Free Board Pd QC 3.0 - China 50000mAh External Battery and Fast Charge Power Bank price | Made-in-China.com
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