I replaced the back seat ash tray with a 110V GFCI outlet and a metal outlet cover made it blend in with the rest of the car.
-Forgive the black sheet and towels in the back seat. I case you didn't notice the enormis amount of hair in the car, suffice it to say, I have a dog. The fitted black sheet and towels is the best option I have found to keep the upholstery nice while being able to transport the dog.-
Setup works great for long road trips with laptops/cell phone chargers. Less of an issue with longer battery life in current laptops. Was awesome in 2005.