I was about to order some AW 18650's for my VTR when I came across this thread....I have Efest flat tops which fit, but they are crap batteries and I only got three or four cycles out of them before they quit. Maybe they were knock offs, who knows, but I got them from a reputable ecig supplier. Does anyone know if the AW's will fit ? I haven't seen anyone selling AW flat tops, so I was going to take a chance with the button tops.