85W Car Charger for Apple MacBook Pro 15 "17" Unibody L-shaped Magnetic Auto Adapter 12V DC Area MC556LL / B - 18,5V 4.6A (models until the end of summer 2012) (Electronics)
I tried it this weekend, I have a camper and I do camping. Now I can work on my MAC and watch a nice DVD evening. I am very happy with my purchase.