it isnt a no brainer though, provari goes to 6 volts, lava tube 4.2...provaris better theres a reason it costs more because you get what you pay for....i paid like 175 shipped, regular stainless color....i didnt get the extention cap/battery even though i should have, extention cap is worth it cheaper in the long run just to get the higher mah batteries and extention because if u buy that afterwards your going to be left with your first set of batteries your not going to want to use anymore once you have the extention cap.....if u wanna go with the lava tank go ahead 4.2 peak is a joke for a vv