Ultimate 13" with Coolbook, solid 7 hours of countinous surfing without flash or light youtube with 40%~50% brightness.
If you use it offline, taking notes and stuffs, expect to see battery life as long as 8~9 hours. I wouldn't be worry about the battery, if anything, I'll be running out of juice with attending lectures continuously for 7 hours. I believe MBP last just as long or a little longer.
If you want to watch some movies during break times, you'll still see 5+ hours of usage depends on the movie resolution etc.
I'm sure you don't need to use the laptop 100% during full 1 hours lecturer, taking some notes, then idle for 10 mins, some notes, idle 15mins. Great thing about the MBA is that it virtually freeze the battery life whenever you close the lid and go into sleep mode. I left my MBA over night standby on battery, next morning I wake it up and it's instant on as if I just close the lid 5 mins before, and I get only 1% battery lost.
Awesome, that's great to hear. As I *think* I stated before, It's either a MBA or a MBP, depending on how much they are when they're refreshed and what they're offering.
My budget is going to probably be 1200 with tax... and looking at the Air prices right now, it might actually be out of my budget to get a 13 inch. (11 inches don't have that great battery life).
It's going to kill me if the prices are too high; however if they are, I can always go for an upgraded 11 or just get a MBP. But yea, I'm going to be typing, idle, transport, web browsing, maybe some video here and there, and continue throughout the day.
Because I have all Science and 1 calc class, I don't think I'll actually need the MB during lectures; doing things before and after is my main concern. I'm living off campus next semester (thank God lol) so I need it to last the entire time I'm at school. (I hated lugging my old charger with me)
But yea, thanks for posting man. The new Airs won't be able to use Coolbook but when I take the trip to the Apple store this weekend, I'll keep that in mind.