MetalBryan
Well-known member
Here's something I came across in the bike shop today. Not sure how new this tech is but it's new to me so I watned to share. For cyclists at least it is a better solution for USB than solar charging. There may be other brands I didn't dig too deep.
pedalcell.com

PedalCell
PedalCell converts your bike's wheel motion into continuous USB power. It it has 3X the power output of any rim or hub dynamo. PedalCell mounts on nearly any bicycle in minutes, and is weather-resistant.
