Rob, standard model (perhaps in Cda) comes with 3cell and it's only good for 3 hrs. I could buy a 6 cell but it addds weight and I believe is a little larger. This is good enough as my second computer, really bought it so I'm always in touch with the market when I'm out of the house.
So far the only clitch is the bilingual keyboard on the special characters, takes some getting use to.
Has 3 usb's for bigger hard drive, rom drive, external mouse etc.
Portability is great