I have been using a HP for a car computer for about 3 months now. They work great. The power supply is nothing more than a laptop power regulator. Since there is no internal power supply for this computer and the home power supply is the same as a laptop, a 19v 3.4 amp power regulator(foudn it on ebay for $20.00) works great in your car. It also uses a Slim CD drive wich is great since the CD's dont skip as much this way. I am also using a Datalux LMV10R 10" Touchscreen. Which is also a 12v power input. So far so good, I have had no problems with this and it only cost me a total of about $400.00 with all the cabeling and everything. I run the audio through a fm modulator and hooked up a momentary swith to the power button so it can be turned on and shutdown from the dash board, since the computer is located in my trunk. If anyone has any input on this let me know. I would love to here some responses.