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 ...

Instructables user [bennelson] is combining all your electrical powered needs by cramming solar power into a can. Already designed to resist the elements, [bennelson] is using a 50cal. ammo can ...