How come the new macs seem to have a smaller battery @ 4200 mAh? I have a sept. 2007 macbook and the battery on this is a 5000mAh one. Is this much of a big deal? Just curious. I get around maybe 4 hours on it if I don't do any video watching. Video kills it as my fan just goes on and goes crazy at 6200RPM lol.. stupid GMA 950
