Quote Originally Posted by FenderBender View Post
Its tough because the vf of two blue or green dice are usually right at the threshold of a 7.4v pack. I have had sometimes where it worked great, and other times where it failed miserably and I had to re-wire them in parallel. I try to avoid the // wiring on PC as it only puts out 1.5A (750ma each die). That is horrible, but its not optimal. Still, it would be pretty bright.

Try it in series first, if it doesn't look good, re-wire it for a parallel set-up. You can also, use the diagram above and wire the second pair for full power and get REALLY bright......but your runtime on a 14500 pack would suck......still.....mmmmmm
hmmm yes suck it and see job then, iv been looking over my design and i may be able to shoe horn a pair of 14650s in there but nothing bigger . just out of interest how would two die's run in parallel compare to say an overdriven rebel or a 5w led engine?