Cheap, medium-low output, cheap, primary-123, cheap

[Fallingwater]

I've come across a few primary CR123s at a very low price. Knowing the reputation for reliability of these, I'd like to have a flashlight that runs a high-flux LED at reduced output for a decent runtime from a single CR123. It has to be cheap though; DX KD and other cheap chinese sites are perfectly fine. It's OK if it doesn't support rechargeables - it'd only be used with primaries.

Any ideas?

Edit: sorry, wrong board - I wanted to post this in the LED flashlights forum. Could a kind soul move it? Thanks

 

[gcbryan]

You can get (from KD) an Akoray K-109 3 mode programmable for $20 that uses (1) CR123 and a XR-E Q5.

You can program it in any way that you like. In programming mode the output ramps up, you stop it where ever you want it and that's your mode. You can have low, med, hi or the reverse or med,low,low or low,low,low whatever you want.

 

[Fallingwater]

I have a K-106 that works the same way. I thought I'd found the perfect AA-sized flashlight, but it seems to have heat issues; if I run it at full power, it always dims the LED after a few seconds - even with a known good cell.

 

[gcbryan]

I have a K-106 that works the same way. I thought I'd found the perfect AA-sized flashlight, but it seems to have heat issues; if I run it at full power, it always dims the LED after a few seconds - even with a known good cell.

Have you tried opening it up and unscrewing the pill and coating it with heat transfer paste (thermal paste)?

I guess it's luck of the draw with those lights. My K-109 has no problems in that regard.