I have always had trouble with different charging cables for the iPhone 3GS on the vehicle socket or cigarette lighter. Because of the many positive reviews I thought ... ok last time you try your luck! And ... hallelujah ... packaging on iPhone off and immediately loaded. Since 14 days without any problems in several car in action. Worth every penny - a big thumbs up. PS: If the power socket or cigarette lighter socket in the center console and his cell phone holder with the iPhone on the dashboard or to be attached to the disc one with a certain train of life on the plug. Could the long run might wear out the iPhone socket. Here the spiral cable might like to be a little longer.