My goal is to create a portable LCD screen and eventually I will want hook ups for other things. But I want to know if I buy just a LCD screen for a laptop and a battery for a laptop if it will run. In theory it sounds good I just don't know a whole lot about laptops and can't find anything about it out there so.
Basically I want to use it as a portable LCD screen for electronics that don't require much power for instance old gaming consoles and a dvd player, I also want the battery to be rechargeable which is why I aim for the Laptop battery.
I've done a bit of googling for you, and from what I've read, it's probably more trouble than it's worth. Mainly due to the unusual voltage for internal signal levels used in the laptop display.
You're probably better off searching for a portable LCD TV with the usual composite/component/S-video inputs. If it was designed for 12V in a car, then you could quite easily make something up with a rechargeable battery.