I discovered there are some 14250 batteries which 2 together are slightly longer than a 14500 battery. I use the 14650 battery on my e-power right now, but was wondering if there is a 5v switch in the works so that we could get 5v out fo the e-power? I know there was mention of a variable volt switch. i assume that would do the same thing? I definitely am loving the 3.7 e-power vaping, but used to have an old 901 pass through and would love to get that kind of power vaping out of my e-power at some point. thanks for any info on this point as the 2-14250 batteries would provide the 5v type vape with the same form factor as the one 14650 battery 3.7 vape.