I'm trying to decide on a new computer for school and I've narrowed it down to a few choices. One of the main deciding factors will be battery life. So how much does everyone use their computer for notetaking during classes? Will I need my battery to last a couple hours or would it be better to get a battery that lasts around 8 hours? I'd appreciate any advice from NYU students, especially. I'd also appreciate input on these models if anyone has experience with these brands: Lenovo ThinkPad T420s AsusU41JF-A1 Apple Macbook Pro 13" (anyone notice if this overheats a lot with the new processor and OS, my sister has the 15" and it gets way too hot for me to use) Toshiba Portege R835-P50X Sony VaioVPC-Z116GXS I currently have a ThinkPad and I have experience with Macs, I don't know anything about Asus, Sony, or Toshiba so if anyone can tell me how reliable they are that would be great!