I just wanted to share a few observations on the Fenix lights which have been so highly reviewed by you and others.
First, they eat o-rings! Opening my L1 for the first time to insert a battery, it promptly destroyed the o-ring at the switch end. When I replaced the ring I added the lubricant it should have had from the factory. Yesterday I accidentally opened it from the wrong end... and upon doing so it promptly destroyed the o-ring at the LED end as well. Again, there was no lubrication on this ring. Lessons here: the rings are very fragile, and they are not properly lubricated at the factory. Perhaps that's why they ship 2 extra rings with every light... because they know you're going to need them!
Second, the battery contact/switch assembly can back out of the end cap on its threads. If it does, you will not be able to screw the cap back on far enough to complete the circuit. The "field fix" is to pinch the "guts" carefully between your thumb and pinky finger (with the pinky inside the endcap and the thumb on the rubber switch button) and thread it back into the end cap as far as you can. I would have used a tool to do this, but I didn't have anything with me at the time.
For reference, I am a mechanical engineer with roughly 30 years of professional experience.
还有:
Picky Little Things: Some third party individuals have noted slight problems with flickering. This may be due to a poor connection in the switch. Contact the supplier or the manufacturer if you have this problem. The light I tested worked fine.