A couple questions about buying a refurbished MBA - probably the older model (i'm partial to the backlit keyboard...) 1. Does the "OLD" MBA support intertial scrolling? I played around with one at BestBuy and it didn't (but maybe this is because they didn't so a firmware update?) 2. Battery Life? The apple website doesn't explicitly say the refurbished MB's get a brand new battery (ipod's do). Since its no longer in production, what kind of battery would a refurbished "old" MBA ship with?? would it be like new? Thanks!