Currently Being ModeratedOct 4, 2012 1:32 PM (in response to usernametim)
Yes, that's exactly what I did. I keep an iPad-compatible charger in my car's accessory port, and then I keep both a 30 pin cable for my iPad and a Lightning cable for my iPhone 5 in the car, and I just swap them into the charging port for the device I need to charge.
Even if you have an iPhone-only capable 12 volt to USB power converter in your car, it will charge fine as the power requirements are the same between iPhones.
Currently Being ModeratedOct 4, 2012 8:33 PM (in response to usernametim)
Or, if you want, you could buy this. I did it works great with iphone5 -