You could stick a 500 or 1TB drive in it if you wish. As long as it is a SATA drive, it should be good to go. WD blue drives have been my goto for awhile on lappys.
Batteries are sometimes harder to replace than hard drives. Some OEMs look for a specific battery, and will either not boot or shoot warnings during boot. I just looked up that battery pack, and it looks like the old Compaq/HP battery pack thats been around for years so you likely won't have to deal with that previously mentioned BS. I have ordered more than a few from Amazon and Ebay, no major problems yet.
Edited by dpunisher, 05 May 2012 - 03:09 PM.
I am a retired Ford tech. Next to Fords, any computer is a piece of cake. (The cake, its not a lie)
3770K @4.5, Corsair H100, GTX780, 16gig Samsung, Obsidian 700 (yes there is a 700)