"Power beaming via SUDDAR. It’s not just for running those little ant-things they use for harvesting. It’s also for charging death asteroids remotely. The death asteroids are capable of charging themselves without help, but it looks like it would take about a day on their own. So they have huge reactors in the cargo carriers which, in combination with the SUDDAR beaming, can run ants, drones, mining carriers, or charge up death asteroids."