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Battery: 3pcs from Old Laptop (1500-1600mAh per battery)
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3s 20Amp 12volt BMS Circuit 1pcs
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MP1584 DC-DC Step Down Adjustable Buck Converter 1pcs (for 9/5 volt out)
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DC socket 3 pcs
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DC Jack 4 pcs
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DIY Kit for Mini UPS Making
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Battery capacity Tested
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