Northernflame said:
Improovement to the c2 would be:
FWD Clicky.
Spring for the + (positive contact) to connect to protected cells.
Possibly a 2 mode . However with a head twist switch. I hate doubble+ clicking.
Some sugested a 2 18650 tube modele. Nice idea, however the idea would have to be to add more run time. Which will probably require a circuit mod.
The C2 already has an orange peel reflector.
Lastly to get rid of that horrid purple tint.
Well, I got a couple C2s -- one from DX (soft finish) another from Kai (Hard anodize). The Kaidomain one had the purple tint, which I didn't like. I ended up dropping the light engine from the DX C2 into the Kai C2. I also added a + end spring, and replaced the button with a forward clicky.
Aboslutely amazing light with those changes, I now use it more often than my Lumapower M1 (which I have since modded with a lens for pure throw).
Two batteries would extend runtime, though probably not 2 to 1. The light is fairly well current regulated, delivering around an amp to the emitter (I replaced hte emitter that was purple with a different Cree, and took some measruements) regardless of the battery used. Power drawn from the batteries appears to be constant as well, as the current drawn from reachrgeable 3.7V cells is less than the current drawn from regular CR123s, or 18650. So a longer tube would give it longer runtime out of the box. It would also stay in regulation better, as the light is a buck circuit (steps voltage down) and about halfway through the runtime on 1x18650 the driver falls out of regulation and starts getting dimmer.