If you have a dynamo generator-equipped bike, $100, and a USB-powered gadget that needs charged, Dahon has a doodad called the BioLogic FreeCharge coming out in March that just might interest you. It basically grabs the power you generate while pedaling and outputs it via USB cable, allowing you to keep your phone juiced up along that 100-mile bike ride you’re always talking about doing someday.

The little weatherproof box attaches to your bike frame and provides enough power to recharge an iPhone in about three hours, so it might not be that advantageous to casual commuters. Long-haul bikers, though, may just add this to their equipment arsenal with little resistance.

[Bike Hugger via Wired]