Just wondered if anyone has noticed any difference between using 18650's or 18350's in an iTazte SVD? I use Efest brand, both sizes. I know actual battery life is shorter with the 350's, and I don't care about that. I always have a spare charged and ready to go. Same with the 650's. They never leave the house either. I use an iTazte VTR for out and about. I have watched the tech specs in PBusardo's vid as well, but I was just looking for input from some daily hands on users. I'm trying to decide on which device I want to dedicate to 18350 mode, and it's either the SVD, or my Vamo V5. I prefer the look of the SVD in 18350 mode, but I don't want to short myself on performance, because it has become my "go to" PV. I use a nautilus, a Davide with PT coils, PT2, and an iClear30S as my toppers. I will be getting into cartos/carto tanks soon, if that makes a difference.