Black 2-in-1 USB 3.5mm Audio Charger Cable for iPod iPhone
I combined this with a [[ASIN:B0042B9U8Q Griffin Powerjolt Dual Universal USB Micro]] connector for my vehicle.  An iPhone 4 (not tested with the 4S) accepted this cable without any problems allowing me to both charge and listen to music at the same time.    If I were to use a manufacturer or carrier charger, combined with the headphone jack to connect to my car stereo, I used to get a nasty, high-pitched whine from my stereo while charging.  Because this cable pulls from the line-out audio channels, the na