Supernova Plug III! These puppies are hard to find. We got ours direct from Germany. The 3rd generation provides more consistent charging across a wider range of speed. Just wire one up to a Dynohub and you’ve got USB power over 7mph.

Posted on by Topanga Creek Outpost Adventures

http://supernova-lights.com/en/products/the_plug.html http://topangacreekbicycles.lightspeedwebstore.com/supernova-the-plug-iii-usb-charger/dp/9258