I ordered my TM early on and have had none of the teething problems I've heard others here experience. Mine has worked with different batteries and has been very reliable. Well, that streak has come to an end. I have it a couple of months and last night it failed to light when I went on my nighttime hike. When I got home, it worked fine. I changed the batteries and went out again tonight. Once again, it came on, no problem, and then began flashing, one led only, and wouldn't work at all. I put it in a holster, pulled out my backup light, and continued on. About an hour later, as I'm back in my car, the TM comes to life in the holster. I immediately pull it out and shut it off.
I unscrew the end, rescrew it, and the battery level shows four plus 2, meaning fully charged. I turn the light on, it stays on for about a minute, and then it goes off.
Now I have to remember what website I bought it from. I bought so many lights in the past few months, I don't remember. Damn.
Mark
