NC-17 Appcon, Bicycle Dynamo USB Charger, Waterproof, Includes Power Bank Battery, Bluetooth, GPS Android iOS App, Mobile Phone Charging from Hub Dynamo, Dynamo Charger, Bicycle Charger, Emergency Power for the Bicycle :
Sinewave Cycles Revolution Dynamo to USB charger | Bilenky Cycle Works
Review: PedalCell bicycle power source | road.cc
List of Hub Dynamo USB Chargers and Charging Systems for Electronic Devices - CyclingAbout.