The umpteenth flashlight was completely corroded out by a battery that leaked despite the fact that it was delivering power. It almost wrecked a nice cabinet along with it. So, I just got a flashlight with crank from Costco. Duracell KP028, two for $15, even has a radio with weather band in there. Now I am curious: Does anyone know what kind of batteries are in there? Maybe even a super-cap?
Google didn't lead to any hints and according to the Duracell site they don't even make them (!). Then again their site isn't very good, lots of "The system cannot find the path specified."
I am not a fan of LEDs, they just aren't as bright as regular flashlight bulbs. But this thing is pretty good. One minute of cranking and it lights long enough to find stuff, even keeps its charge. Ok, they say 30 minutes but it gets dim after 5-10 minutes. Good enough for me, if the battery holds up over the long run.