http://www.mec.ca/AST/ShopMEC/Cyclin...rear-light.jsp

Have been quite happy with the MEC Plasma rear light and the front is a good marker light but nothing to really see by... run time on the rear has been excellent.

I have enough things that use a mini usb plug that having a charger at hand is not a problem and the supplied cable is pretty compact and a second cable is not that great of an expense if you want one at work and at home.

My primary rear lights are PB Superflash... bought the usb lights as spares or for bikes that do not have a PB mount on them.