Energy cell (vibroblade)

Some Vibroblades could be equipped with an energy cell that allowed the weapon to inflict energy based damage in addition to slashing damage.

This made the weapon more powerful and more versatile. The best energy cells (Mark III & IV) could provide extremely high energy damage that rivaled the amount dealt by a a lightsaber, in addition to the slashing damage, making a vibro weapon with an energy cell incredibly deadly.

Appearances
Star Wars Knights of the Old Republic II: The Sith Lords