Well, I setup a laptop once.
I used a airline/car adapter and set the power settings in windows to shut down in 5 minuets when running on battery power.
Had to wire up a switch in te dash to start it though...........
There's a couple laptop startup/shutdown modules on the forum if you search for them.
For once you have tasted flight you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.
Leonardo Da Vinci