This seems like a small system, and I would be surprised if there is a charge controller for 1.5 V. You may not need one. I expect one diode would be enough. Voltage across the diode may be 0.6V, so you might need 2.1V from the generator, just to charge the batteries. I don't think you will...
researches of modern science have proved that "wool, when combined with linen, increases its power of passing off the electricity from the body. In hot climates, it brings on malignant fevers and exhausts the strength; and when passing off from the body, it meets with the heated air, inflames...