You do realize, if you have it in High Performance mode on Battery, it'll suck it down in an hour? I proved this with Arkham City and didn't have much time to grab the power supply before it went into hibernation.
Under WIndows 7, head over to
Control Panel then to
Power Options. Once there, select
High Performance. I would suggest selecting
Balanced instead due to the battery taking quite a hit and it'll only go to full speed when it needs to.
Router(Nokia IP390,4GB RAM,4x GigE SFP Ports,4x 10/100/1000mbps Ports,OpenBSD 5.5)
MyWS(Phenom II X3 720 BE@3.3GHz,8GB RAM,2TB+2TB+1.5TB HDDs,GFGTX560Ti,LG WH12LS30 BD-RE,W7U)
MyNB(Asus G53SX-XT1,Core i7-2630QM@2GHz,24GB RAM,2x2TB HDDs,BD-RE,W7U)
MyMC(Pentium E5200@3.5GHz,4GB RAM,3x2TB RAID5,GFGT520,W7U)