Activation stud

The activation stud, button, slide, switch, lever, or plate, was a component on the hilt of a lightsaber or lightwhip that activated the weapon's energy blade. It was generally a prominent button, although Asajj Ventress concealed the activation switches on her lightsabers.The New Essential Guide to Weapons and Technology
When a lightsaber was activated, it stayed active until the wielder pressed the activation button again to deactivate it. However, if the lightsaber had a pressure grip, it automatically deactivated when the wielder was no longer holding the lightsaber, such as when the wielder was disarmed. A lightsaber could also have a locking activator, which was a specialized activation stud that could lock the lightsaber's blade into the activated position, even when the wielder was not holding the lightsaber. This allowed the wielder to use the lightsaber as a thrown weapon. Locking the blade prevented it from being accidentally deactivated when the weapon impacted the target.Jedi Academy Training Manual
A trapped grip was another modification that was used to prevent unauthorized users from activating the lightsaber. If someone attempted to activate it without disarming the trap, they would be injured by an energy discharge.
A rare modification was the Force-activated lightsaber. This required the wielder to activate their lightsaber using the Force, thus removing the activation button from the lightsaber's hilt.
Skillful activation and deactivation of a lightsaber was a key feature in Tràkata, a form of lightsaber combat that involved repeatedly activating and deactivating the lightsaber. For example, a technique called "Pass the blade" was used to deactivate the lightsaber then reactivate it to pass through an opponent's block.
Lightsabers had other buttons and knobs that adjusted the blade's length and its power or intensity.Star Wars: The Visual Dictionary In a dual-phase lightsaber, a second lightsaber blade could be activated that was twice the length of a normal blade.
==Appearances==
*The Old Republic: Fatal Alliance 
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*Shatterpoint 
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*Coruscant Nights II: Street of Shadows
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*Splinter of the Mind's Eye
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*Star Wars (1977) 96 
*Heir to the Empire 
*I, Jedi 
*Fate of the Jedi: Vortex 
*Legacy (2006) 49
==Sources==
*A Guide to the Star Wars Universe
*Star Wars Technical Journal of the Planet Tatooine 
*Star Wars Technical Journal 
*Tales of the Jedi Companion 
*The Essential Guide to Weapons and Technology
*The New Essential Guide to Weapons and Technology
*Jedi Academy Training Manual
==Notes and references==
Category:Lightsaber components