Sting Ball
this type of energized ball was developed for training military personnel, and was later adopted by Jedi Knights. The sting ball produced a stinging shock when it impacted with its target. Thus it could be thrown at an individual in any number of exercises. Most military training facilities used sting balls to teach agility and speed. The Jedi also used them as part of a centering exercise, where apprentices were taught to maintain their composure while teachers were assaulting them with sting balls.