I think what victory was trying to express was this...the main reason LR atty's and cartos were developed was to simulate a 5 volt vaping experience on a 3.7 volt device before variable voltage devices were really ever made. The Fistpak was, to my knowledge, one of the 1st if not the very 1st vari-volt device, and it was actually made by a man in Canada named Nuck or Nuk,can't remember the way he spelled his name. I have 3 of those same devices,1 bought from Nuck himself and 2 that I built myself but with a little better technology inside to help with the 18650 battery life. Im not saying you can't use LR on a Vari-volt device, it just kinda defeats the purpose. The vari-volt device was primarily bulit to use a 3.0 ohm carto or higher.....or dual coil 1.5 ohm and up because the device is actually seeing 2, 3 ohm coils not a 1.5 ohm load. Can you use LR cartos and atty's on a V V ? Absolutely, do I ? No way! A single coil carto keeps my batteries running longer, and a Dual Coil I ONLY use sometimes on my VMAX's when Im not running my fusion 3.2 ohm cartos. Im hoping this is what victory was trying to get across, if Im off base with any of this victory please correct me. Take care everyone. ........................J