After reading positive things on these forums, I invested in a couple of the Fenix P2D lights – the supposedly “Premium” Q5 version. Wow – these things SUCK !!!! I can’t believe how completely unsuited they are as bike lights. TOTAL FAIL !!! I can’t believe they market them for bike use. I can’t believe that there were morons who endorsed and wrote favorable reviews of them. Mostly, I can’t believe that I was stupid enough to listen. Given that they are dark in color and tubular in shape, I’m going to say that they resemble turds much better than they resemble bike lights.
The lights themselves cost me about $55 each, plus shipping I paid about $120. Another $15 for helmet and handlebar mounts. These use the C123 cells, and I wanted rechargeables, so I ordered a set of 4 rechargeables and a smart charger to go with them – about another $40. All told about $175. I don’t know about your town, but around here, a guy can get [edited by Mods] for a lot less than that. Worst bike-related money I’ve ever spent, and I’m just furious with myself thinking of the decent lighting systems I could have gotten for that kind of $$.
With the rechargeables, the lights will just spontaneously turn off. The battery isn’t dead – the light will just cut out. In fact, this will happen with a fully charged battery. After a minute, they can be switched back on – and they will run a few minutes until they decide to turn back off again. This happens most notably in the cold (you know, like in the early spring, fall and winter, when it gets dark early so you probably need lights for riding.) I was told here that the rechargeables have a protection circuit that is responsible for this delightful and surprising “Lights Out” game. I’ve had the cells tested, and they all hold a good charge, so it isn’t a matter of the cells running out of juice. The lights do work better with disposable cells, but that sure is expensive. Moreover, even with the standard cells, if you hit a good bump, they will reset to the lowest setting.
Let’s see – a light marketed for biking use that won’t work with rechargeables, turns off spontaneously at varying intervals (especially on cold dark nights), and can’t handle a bump without interruption. Wow – that would be the worst possible kind of bike light.
Just wanted to rant because I’m so #*&$ing mad, and to warn off others – DON’T BUY THESE FENIX P.O.S. LIGHTS, and don’t listen to those who tell you that they work. I’d like to find a representative of Fenix to beat my $175 out of.