I have a brand new Hyundai Elantra (2013) that has a built-in USB port. I plugged in Lightning-->USB cable to my iPhone 5, expecting it to charge. Nada. The battery icon flashes like it's charging for a few seconds, stops, then runs off battery. So then I tried my old iPhone car charger, which has an extra USB port to charge an additional device. Plugged the Lighting cable into that too. Nada. I was hoping this would keep me charged in the car until I get the 30 PIN adapter to use with the Hyundai-specific cable (that lets me control music via the steering wheel). I repeated this with all 4(!) Lighting cables that I've received between yesterday and today. They all work fine on my PC or wall charger. Anyone experience this? Very frustrating.