The V4L shorty
batteries are 180 mah (milliamp hours). That's the same as the standard 510 battery. They do not last long on a charge at all, really. That is one of the frustrations of the minicig, or cigarette almost sized, batteries. There's just no way - yet- to put a lot of energy into a battery of that size. The standard V4L batteries are 280 mah, and the xl version are 380 mah. Each lasts longer, respectively, but is less and less cigarette sized - being longer, not wider.