Just ordered a pair of the 14250 3.2 volt batteries to try and 1 AW IC 14500 from innovapor. I just found out one of my blue ultrafire 14500's is a dud so now i will have a good goto battery (AW IC) and an ok backup (ultrafire) and some for 6V. I cant wait to try the 6V as i have never vaped over 3.7V.