Prior to the Skirmish at Vanqor, Jedi Knight Anakin Skywalker allowed himself to be captured by a Munificent-class star frigate, commanded by Count Dooku in an ice field near Vanqor. Once inside the ship's hangar, he put up a fight in order to make his capture look convincing. He was defeated and taken to a prison cell.
Jedi Master Obi-Wan Kenobi later infiltrated the ship to release Anakin in order to help apprehend the Count. While making his way to the brig, Kenobi encountered a squad of battle droids, including this one who was operating a control panel. The Jedi managed to sneak up behind the droid and opened a door to continue on his way. This droid heard to door closing, but thought nothing of it and went back to work.