I finally ordered a provari 2.5 and ext cap and then it hit me that my batteries my not work with it. I have samsung inr 18650 25r i think its flat top and i need button tops? I tried to find a provari thread and im sure everything to know is there but i was stuck in the maze of threads. If my batteries dont fit will the ones i need be at local vape shops,maybe? Common battery,easy to find? I picture my provari getting here and then having to wait on batteries to show up,lol, i dont wanna!