Bicycles need Vitality to energy running lights as well as other products. There are 2 frequent forms of generator in use on bicycles: bottle dynamos which have interaction the bicycle's tire on an as-required basis, and hub dynamos that happen to be straight hooked up to the bicycle's travel train. https://bluemagazinez.com/revolutionizing-power-the-future-of-generators-in-a-sustainable-world/