Okay, I guess I'm gonna hafta get my XL replaced. I bought one after seeing the reviews (mainly KC's), but I just haven't been that impressed. When it's fully charged, it seems to perform the same as the standard batteries. But within 25 puffs or so, it starts dying off. After another 25 or 30 puffs, it's pretty much done. Not dead, but the vapor production just falls off (the face of the earth!!) The LED still lights up for a good couple of hours, it just won't produce. I almost always go back to my trusty black auto that came with my original UU Kit. If I hadn't paid the $25, I'd just use it as is. But I guess that's what the SMILIN WARRANTY is for!