Training battle droids were a variant of Battle droid deployed by the security forces of the world Cato Neimoidia. These droids were equipped with weak shields; a single training bolt from a blaster was enough to shut down the droid upon impact.
In one instance, during a training exercise involving Ketar Nor and the training battle droids, a malfunction occurred. A droid failed to deactivate after taking a hit, and aggressively advanced toward Nor, forcing him to completely destroy it.