I love the light. It's awesome. I could spend a long time talking about how awesome it is. I won't, but I could.
However, I am experiencing strange behavior while using the 14500 (it's fine on a regular Alkaline AA). The light reverts back to its "default" after being turned off - Max with bezel tight, Moonlight with bezel loose - in 12 and 20 seconds, respectively (instead of the 3 seconds it should be).
I've removed the 14500 and am now using a Alkaline AA. I also checked the 14500 (after some use) on the multimeter - it's at 4.03v. For what it's worth, the light worked fine while I was using the 14500; low modes were preserved, and max was significantly brighter.
I've gotten what I paid for, and these UtlraFire's are probably bad. But I'm befuddled by how this "bad" is being exhibited. Why is the time-delay for mode reset affected by the choice of battery?