We have seen lots of powerful power banks, but as a cyclist, you may prefer a bike friendly way to charge your mobile devices. Take a look at the 2-in-1 bike smartphone dynamo portable charger with LED flashlight, it may be a nice solution.
This is a functional and eco-friendly USB charger designed for cyclists. As shown in the images, the portable charger features a bicycle generator, and using included fixing kit, you can easily install the generator to the rear wheel of your bicycle. Just keeping your bike at 12km/hour, you can use the bicycle generator to charge your smartphone or other mobile devices. Moreover, the USB charger also comes with a LED flashlight also powered by your kinetic energy in order to illuminate the road ahead.
The 2-in-1 bike smartphone dynamo portable charger with LED flashlight is priced at $49.99 USD. If you need it, jump to USBFever online store for more details.