so i got my 15" core i7 yesterday. i let it die down to a few percent, fully charged it, let it fully die and turned it off for a night, then fully charged it again and the battery says i only have 2.5-3hrs i have a 2.4ghz mouse, and bluetooth wireless keyboard. surfing the net and itunes here and there with the comp attached to my plasma and ichat on and brightness fully up is this normal? it also says my comp is 142 degrees from istat. should i take it back?