CIO

Battery free bike light

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Kristofer™Hunter@kristofertm · #7 Product Hunter. E-Skateboard fanatic
I love how the magnet get attached to the wheel and charges the light by riding. I've seen others that use a wheel that's held against the tire to spin as the wheel turns but that always makes me feel like the friction it causes it too much to warrant that type of device. This seems super smooth and well thought out.