Meet the PedalCell: a pedal powered charger that lets you charge your smartphone and other USB devices as you ride your favorite bicycle. It can be installed with a simple Allen key, so you can easily switch it between all your bikes. The device has 2 x USB-C ports. PedalCell has a tough case to withstand bad weather.
This 15-20W pedal powered smartphone charger weighs only 490g and has a compact enough design not to get in your way. It fits touring, hybrid, and other common bicycles.[where to get it]