Battlethrusters were a type of spacecraft.
A battlethruster made an emergency landing on one of Grundle's satellites to await repears. The satellite was inhabited by Drashigs and the fifty-man crew had all the latest weaponry and they thought they could hold the Drashigs off. However, with nothing more heard from the thruster, a scout orbiter was sent out, and the pictures showed that the Drashigs had eaten everything except for some of the battlethrusters' reactor components. (TV: Carnival of Monsters)