LightCharge Hub Dynamo USB Charger converts the power from your dynohub into usable, chargeable power. LightCharge is compatible with most major bicycle dynamos such as Shimano and Schmidt. It is exceptionally lightweight at less than 2 oz (56 g) installed, and can be attached to bars, stem, or any bicycle tube of your choice.
LightCharge is connected to your dynohub the same way you would connect a bicycle light, with a frame and electrical cables. The unit has a USB port for your USB-chargeable devices plus an additional leg for your dynamo light. Using a toggle switch, you can alternate between charging your devices during the day, or powering your lights during the night.