I got one at BestEcig.com last year, and I can't swear to it, but it certainly felt like 5 volts. I also got one at Trueman-ecig.com, and although I never really used it, I suspect it was the same. I know the one at BestEcig is listed as a DSE-103. It's all the same.
I'd probably sell you one of them if you wanted, now that I think about it.