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 ...

50-caliber ammunition typically used for machine guns and sniper rifles. CBP posted an image on X of ammo seized on January 20 and described them as “armor-piercing and incendiary.” ...