99% of the time I am vaping with an 801 atomizer. Someone once said that all the PVs basically are the same if the battery, juice and atomizer are the same. But I find that to be untrue.. .... I can use the same battery from my Jantystick V2 with my Bulli Slim. Same atomizer and juice same adapter.. vaping is totally different..Bulli being weaker. I believe these AAA size batteries are 3.7v ...yes? So then using my 3.7v battery in my SD and GGT should also be the same, right? Same battery, juice, atomizer etc on a full charge always . . . GGT more powerful than the SD which is more powerful than the Janty Stick which is more powerful than the Bulli... PLUS the rape itself feels different... with each... Tons of rape with the JS. much Mon than Bulli. . .