It seems as if my UltraFire Gets a little warm,I stopped holding the thermometer on it after the point shown in the picture,and continued to let the light run after words.. It gets to hot to handle,although it seems as if run time has increased,I will test that tomorrow,when I have had some sleep,I added a capacitor to the circuit,and added a larger inductor to it,also put a K2 in it,before the circuit mods.. Its brighter and runs longer,but whats the damn point if you cant even handle it ??? Its still running,and probabbly getting even hotter... sigh :S
Russ