Has anyone successfully used a Lumapower LM301 with a 14500 ? When I try, it works on low mode, but only flashes on high mode ? The battery reads 3.85V, so it should work, as the LM301 can supposedly handle up to 4 volts.
I just tried mine again on a 14500. I can't tell any difference on high versus the alkaline...however, that was in a somewhat dark garage. Maybe I need to try later tonight, when the garage is really dark. Like previously mentioned, you'll have to change the resistor to get the low level back. With the 14500, both high and low modes are pretty much equal brightness.