Contains 3 kilograms of the rare earth element Berkelium-249 and the same amount of an unknown element that Nekomimi call 'Morah'. Special reactors installed on the heavy machinery of our new friends extract from these batteries a large amounts of energy needed to operate laser cannons, photon engines, inertial stabilizers and the like. As for reproduction, everything is very bad: it is unlikely that in the entire history of Earth, at least as much Berkelium-249 was obtained as is contained in one battery.