I just ordered some ultrafire 18650 3600 mah and some 4000 mah 18650's online to use in my provari once it arrives. At first I thought it was cool because i had never seen mah that high on any vender's site so i jumped at em....then i got to thinking if the venders dont carry them it must be for a reason so my question is Should I be concerned? The last thing i'd want is to fry my circuit board trying batts this high on this expensive PV.