I've only been vaping for like 5 days. I started with a winder battery, a gladius tank. Yesterday I bought an aero tank, and today I bought an Ego-T as back up battery. I didn't like the Aerotank at first, but I guess it was using the "old coils?" Because that's what they come with? Got new ones today. Much better result. I think I'm going to have to step up big time though. These ego batteries prob won't cut it for long.