My P7 (16092 I think) died after about three months of daily commuting. It comes up much dimmer than it should be, and if I shake it I get flashes of full brightness. I need to take it apart and see if I can fix it, but I'm wary of ever relying on it again - I do not need my headlight shutting off halfway through a 25mph underpass descent.

Since I now have a set of 18650 batteries, I'm thinking about upgrading to a Fenix TK11 to complement the L2D that I'm currently using for a headlight.