I have been using my new Auto DAV for a little less than a week, and I have to say that I am beyond impressed. The draw is light and easy, like the Vapor Titan, and lasts me well over 10 hrs. with a 3.5 ml. tank. Never understood why everyone was so excited about VV, and now I do. Being able to adjust the voltage on the fly really makes a difference in some juice. No way to describe it other than AWESOME!!!!!!! Best battery Vapor4Life has produced yet, IMHO. Everyone needs at least one of these in their arsenal. Only drawback for me is the long charge time, but I can live with it.