[Brandon Fiquett] does a lot of amateur radio communications and needed a rugged portable power supply that he could take with him on the road. He decided to make a 12V power supply out of an ...

Why won’t the Army do the same? At alarming rates, U.S. Army personnel are purchasing their own ammunition magazines prior to deployment. That’s because the Army’s official magazine ...

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 ...