I got one from Fab a while ago (different brand), and two in a row quit right away for me. They were great while they lasted, though, especially in these areas without streetlights or sidewalks, so I can be invisible at night. Hope these are better.
Note for forum mod reading for quality posts: when I went to write my reply, and I deleted the quote code, the entire reply box went away. Some bug there in the code, maybe with Chrome.
*Honest 200 Member* Sept. 2012