I didn't see this in the forum, but you should really look at some of the highend flashlight enthusiast forums because it is almost identical requirements.
They use the same batteries and the LED modules are now drawing around 1A. In fact, I'm convinced one of these flashlights has all the compact guts to do perfect temperature regulation and handle the range of input voltages.. And hey, they are already the right form factor.
candlepowerforums.com/vb/showthread.php?t=179105
For instance:
Anyways, I found this post when looking for information about batteries. 18650, RCR123, CR123 and there are some good graphs showing the batteries over time.
I'm almost positive one of these flashlights could be modded by adding a threaded coupler and the wiring already appears to be there including an on off switch. (snip the red from the emitter and remove it. Done.)
They use the same batteries and the LED modules are now drawing around 1A. In fact, I'm convinced one of these flashlights has all the compact guts to do perfect temperature regulation and handle the range of input voltages.. And hey, they are already the right form factor.
candlepowerforums.com/vb/showthread.php?t=179105
For instance:
Step down constant current driver, High efficiency with dual mode DC-DC regulator (PWM / PFM),working voltage is 2.7V to 8.4V.
Supports three sizes battery, one 18650 Li-ion battery, two pcs CR123A or RCR123A battery.
Anyways, I found this post when looking for information about batteries. 18650, RCR123, CR123 and there are some good graphs showing the batteries over time.
I'm almost positive one of these flashlights could be modded by adding a threaded coupler and the wiring already appears to be there including an on off switch. (snip the red from the emitter and remove it. Done.)