I have recently purchased an Acer TravelMate 2700 as a desktop replacement. The battery life of this notebook is only 1 to 1-1/2 hours. My son would like to be able to use the computer to watch DVD’s when we are on the road for trips of 5 or 6 hours. Will a power inverter work while the car is running and if so, what size (wattage) would be required? In the notebooks manual, it states that this model has a 130W power supply. Any help / suggestions are appreciated.