Judging from pics I have seen with the E-Power18650 next to a eGo, I dont think the tank attys would work. The cone on the E-Power is of a larger diameter. I guess you could use an extender on it but it would look kinda crappy. You may wanna look into getting a 1000 mah eGo-T battery. Mine lasts me over 20 hours on each charge.