Hi I'm looking for the best laptop under 400 if possible for school. It needs to have a reasonable battery life. Like 3 hours minimum? The more the better, I don't need it to die during class. I might take it to a cafe if I feel like it. I'll be taking notes, power points probably and other student stuff. I probably will watch some tv shoes and movies online maybe some in hd. I just don't want it to lag and stop every 5 seconds. I mostly likely wont be gaming. I might play tf2 if im reaaaallly bored but its not a necessity. Please if you could help me out it would be appreciated. If you need more details on my preferences let me know.