FWIW, I had mine fall apart in my pocket at work. The head and collar separated from the body. In it's defense I am separating bread trays off of stacks all night. I regularly catch the trays with my hip. I think the light took the brunt of a few impacts. I got to look it over this morning. I managed to save all the parts out of my pocket. I had to disassemble it completely, but was able to get it back together. It still works too. So although it did seem to work loose and come apart after about 3-4 weeks of daily use, I was able to save it. Now I need to carry it in a different pocket and go easy on it. BTW, I have the larger multi colored version. The red light is great for getting into my treestand in the dark.