Amazon.com : iPod / iPhone Charging Adapter Converter - Convert 12V to 5V - Converts Old iPod Dock,

Perfect for older car integration accessories that don't support charging for the iPhone 3G and iPod models released in September 2008 or later. The Adapter is compatible with: several aftermarket head-units as well as Acura, Audi, Aston Martin, Bentley,

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