Thats what I have been hearing. I got up the courage and threw the 2 18350's in and I put on an regular old Joye 510 atty I have here that doesn't seem to fire to great at 3.7 volts even after a soak in 91 percent alcohol. I dripped in some extra juice to make the atty nice and wet and WOW talk about hot harsh rip your throat out vapor if you take over a 1 second draw!! Didn't do that very long..lol