I'm looking for a good USB car charger that works with the lighting cable. The car charger I had for my iPhone 4 does not work when I plug the cable into the USB port. AT&T told me they have a higher output one that does work but I don't want the additional USB connector and I don't want to pay 30 bucks for it. I'm guessing the USB adapter will need to be able to put out 5W of power just like the new cubes that come with the iPhone 5. Does anyone know of any good and cheap ones on ebay or otherwise that actually work with the lightning cable?