Among the various special devices on droids like R2 units are gasbased fire extinguishers. Effective against electrical fires and can cause confusion during battle.
Deploy on your astromech droid. Cancels an ‘exploding’ Program Trap here. Any starship it is aboard is immune to Lateral Damage and ion cannons. If deployed on R2-D2, may lose Fire Extinguisher to cancel a battle just initiated where present at a site.