I'm thinking about buying a Vaporluxe Rev. 2 variable voltage mod from aceofvapes.com but I can't find any reviews. Has anyone tried one of these? It says it uses 1 18650 2600 mah battery, but it can range from 4.3 to 5.5 volts. I thought that strange since the 18650 is a 3.7 volt battery?? Any feedback on the performance of the mod would be appreciated. Thanks.