tc17 said:
if I ever got one of these type of flashlights, I would probably get the crank kind instead. To me it seems like you would get a lot more leverage to create electricty with that, than you would something you have to shake.
But I could easily be wrong.
i got a crank light off e-bay, that charges some very small ni-mhy batteries in it, and runs 5 x 5mm white leds, and it works GREAT, totally blows away the jerk light
and it will output 350ma at about 5-6V for charging something besides, but that requires a Lot of fast cranking
i was thinking i might use it to charge my pda, but then the thought of cranking it for more than 30 minutes at a time (175ma of actual charge) was not practical.
it also got warm from friction and stuff after 15 minutes of cranking.
it will run for Hours after charging/cranking it, a few minutes of cranking, bright at first, then barly usable for a long time.
the crank to light ratio for good output of 5 leds was more like 1-5, instead of 1-2.