I concur on the 12 cell. There's really no reason not to get one. You'll get almost five hours with full brightness and normal Word and web use. Most likely closer to three hours with gaming or DVD's, but there are other factors too, like hard drive rpm, speaker volume, and most importantly, whether the wireless adapter is enabled. Leave this off and use an ethernet cable can almost get you an extra hour. (But totally defeats the purpose of going mobile, unless all you do is edit photos and type letters)
srw, I just wanted to say that most people don't avoid posts out of arrogance in my experience, and there have been alot of other interesting posts lately. This one just slipped through the cracks.