
Personally, I don't trust the lighter adapters for charging even iDevices - my wife's phone blew a few fuses on my previous car - I bought her a small battery pack that can charge her new iPhone or iPad Mini at least twice while in the car. The following is a reply from a Mac forum that I'm on:

What about a Mophie? It probably wouldn't charge the battery, but would maintain the charge.

I did read about DC to AC to DC inverters. The car's circuit breakers might trip or the adapter itself would overheat. Based on my research, using a cigarette lighter adapter to charge an Air is not recommended.
