For the price of a mid-range Android phone, [Kenneth Finnegan] turned a 50 caliber ammo can into a 50 amp-hour portable power supply. The battery pack uses four 3.5 V LiFePO 4 cells wired in series to ...
If you are searching for inspiration to keep you busy over the next few weeks, you may be interested in this unique portable power supply created from a 50 caliber ammo pack. It’s creator Kenneth ...
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