Double-bladed
The double-bladed lightsaber, saberstaff, doublesaber, sith lightsaber, battlestaff, staff saber or Training Saber, is a variant in which the handle is about twice the length of a standard lightsaber and has two beam emitters; one at each end. The beams can be activated and deactivated independently, allowing for much versatility. This variant was invented by the Dark Lord of the Sith Exar Kun nearly four thousand years before the Battle of Yavin. Kun was able to carefully adjust its length, from half a meter to one and a half meters (1.5 to 5 feet), as well as its intensity, allowing the blades' power to vary from that of a deadly blade to an intangible, harmless beam of light. Asajj Ventress, a fallen Jedi, used two red lightsabers with curved hilts, each similar to Darth Tyr!@#$' (Count Dooku's) lightsaber. They were designed so that she could connect the two ends to form a double-bladed saber, with an "S" shaped hilt.

Besides Exar Kun, notable wielders of this weapon include Bastila Shan, Darth Maul and Asajj Ventress.

Despite the strength of the double-bladed lightsaber, the long size of the handle itself seems to be a weakness in battle against another lightsaber-wielding foe; it was cut in half (Although it should be noted that once cut in half at least one of the blades was still functional and took up the role of a normal lightsaber) when Darth Maul used it in the duel with Obi-Wan Kenobi and Qui-Gon Jinn in Star Wars Episode I: The Phantom Menace. One was also cut in half in the Dark Horse comic book Star Wars: Resurrection, when the resurrected Lord Maul dueled Darth Vader for the apprenticeship of Darth Sidious. Also, the Double-bladed lightsaber was used by the Jedi Brutes, blue on both ends, green on both ends, or both, one color on each, in the Revenge of the Sith Video Game.