Battle droid 513 was a Junk droid that was used for target practice by the Death Watch on Carlac. It was a hodge podge of a Retail droid, a leg from a Crab droid, and an arm from a B1-battle droid. It had a deep Vocalbulator that was asking for pity or mercy. It helped R2-D2, Lux Bonteri and Ahsoka Tano, escape from the Death Watch, however it was shot in the head repeatedly by Bo-Katan and stopped functioning.