I have made a three phase, permanent magnet generator for hand cranking to charge 4, 6, and 12 volt lead acid batteries. Using 22 ga wire, I assumed that, given high rpm, charging would not be a problem. All three batteries behave in the same manner; the generator quickly charges (5 min) beyond their relevant voltage but quickly dissipate under an LED load or any other for that matter, amounting to a 1:2 ratio of cranking/using the battery. Would this suggest that I am not cranking long enough? Not enough current? The generator easily rises to the proper voltage with .60 amps charging the six volt. I naively anticipated a much longer service time, just as if the battery was charged from mains. The six volt battery is rated 3 Ah. If I were to regulate the current with an LM317, how many miliamps are appropriate? Thank you for any advise.