You can keep VW, EGO threading, strait top cap etc...I just want contacts I don't have to clean every other day to prevent my Provari from doing the blinky blink 20 minutes into a fresh battery. It's starting to drive me a little nuts, unscrewing and screwing the bottom cap to get the blinking to stop. I know, I know, just clean my contacts, it's just not always practical to have to do it.