Not unless the driver is removed and the body bored to accept 2 X 123 cells.
IF you do bore it out and use 2 cells it will work fine and so will the 2-stage tailcap:thumbsup:
The KL4 will work on a 1 cell body-E1e/E1L body, but will not run long in regulation.
Do you want a smaller form factor or 2 brightness levels?
Thought I replied last night, but my internet was flaky.
I want a tiny one cell flood machine with two levels. The KL4 currently works on my FB-1 quite well-very bright. And, I can put a McE2S tailcap on it (on a SF 1 cell body that is), and I get two levels of output, and the low is useful. Just wondering if the L1 circuitry will allow the same thing--great excuse to buy that light!
The issue is that the KL4 head has regulation circuitry inside, while the L1 has regulation circuitry inside the body (not the head). I'm pretty sure that the KL4 won't even screw onto the L1 body... even if it could, you'd be trying to power the LED from the L1 circuit AND the KL4 circuit, and the light still wouldn't work.
Won't it fit on any E-series body (like E1E, E1L, E1B etc.)? Couldn't you use any of those bodies with a KL4 head and an RCR-123? The runtimes would probably suck but it would work no? Not sure about a 2-stage tailcap but I'm sure that there is something out there that'd work.