Lightcharge is an innovative battery charger connectable to common bikes dynamos
Easy installation and connection to the most used type of dynamos
Very light package, simple install, and a nice toggle switch, which can route the power to the charger or a dynamo powered light.
I love this product. It charges all my USB devices when running during the daylight and acts as a switch for turning lights on or off.
The lightcharge works as promised. I will never run out of mobile phone (or GPS) batteries again while cycling.