AXA Nano Plus Dynamo Based Headlight with USB Connector (Black)

Really bright! Works as advertised. USB charging is slow but steady. Will keep up with (and maybe get ahead of) smart phone power consumption.

To everyone first I did not pay as much as amazon wanted for it. you can find it through german websites for half but that is another story. the Light is well built, comes with both the wire to your dynamo and a connector and wire for your taillight. it does exactly what it shows; a powerful light that during the day will charge your devices. I have not taken it out yet but once I have, I will tell you how well it charges your devices. comes with 4 different bottom pieces; one for normal nonsuspension forks, one for RST suspension, and two for Suntour forks. the light is very bright and stays on slightly dimmer. hope this helps your decision. Rather than buy a light and a setup for usb charging, go this route.