Enginer droid

Battle Droid Enginers were B1-Battle Droid units that were programed to repair other Battle Droids and Separatist vehicles during the heat of battle. They were equipped with powerful weapons, like the SE-14 Pistol, RD-4 Grenade Launcher, F-187 Fusioncutter, and several Demolition Packs. They were sometimes mistaken for Battle Droid Commanders, due to their yellow markings. After the end of the Clone Wars, Droid Engineers were shut down by the Galactic Empire, but later used in several Separatist Holdouts, like Gizor Dellso's Droid Army.