Ability Duration linearly affects the duration of many Warframe abilities. Increased Ability Duration usually extends the length of time that an ability is active, but there are some unorthodox or otherwise counter-intuitive interactions the stat gives: for example, the maximum amount of charges for Tesla Link increases as a factor of added Ability Duration. There are some instances where negative Ability Duration is desirable, usually because it speeds up periodic effects like Trinity's Energy Vampire or Mesa's Shooting Gallery when augmented with Muzzle Flash.