I bought two LR (1.7ohm) eGo T type B atomizers over a year ago. They averaged about a year life each. But considering that I was swapping between 2 e cigs the whole time, that would put the life at half that, or six months. Used them on mostly fully-charged RIVA 650 mah batteries, close to 3.7 to 4 volts. NOT the much safer 3.3V of an eGo battery.
These were $10 each from Cignot, and had NO warranty. So maybe the warranty doesn't always mean anything.
I know if I were selling them I would be extremely nervous about a warranty because you can't control how they are used. Run dry ? Run at 5 or 6 volts ?
What if some idiot keeps misusing them and returns 10 in a row under warranty ?
100 in a row ? People like that are out there.