There's a write-up about it in the FAQs...
Maybe I should have given more info. Im using a Dell sx260 (i believe thats the model...)
This does not have a header on the board just to plug a psu in. I had to modify the power connector to be able to use the P2140.
I dont fancy going out buying a converter for that sort of money when im more than likely only going to use it once or twice.
So, any thoughts on the car battery charger?