Speaking from experience. To make the long story short. One of their us dealers they referred me to, still has my defective switch stuck in the tail cap. It was only after the fact that I mailed it out did he email me and tell me he can't do anything until he has the rest of the light. About 20 emails later, between fenix, and also this guy, I still have no resolution. Although fenix did say Ken was going to mail me a new switch/tailcap. Whoever Ken is, and I don't think they have my address?
The guy that demands my entire light said first he needed the light for warranty purposes to ensure I have a valid product. I included the warranty card, serial number, pictures of the light, copies of my receipt, now he comes back and said that he needs the rest of the light to ensure proper warranty service. This was after I mailed the tailcap and switch according to his instructions.
I contacted another fenix dealer and he did say to just send the tailcap and switch, but now this other guy has it. HEH. What a pain in the ***. I'm really just providing cliff notes here, but it's safe to say their warranty service is jacked up.