Battery life running Windows 7 under Bootcamp/Parallels 9

I'm contemplating buying one of the new 15" MacBook pros, the fully loaded one with the built in Nvidia graphics, and will want to put windows 7 on it. Assuming I can get bootcamp to work (seems like quite a few people are having issues right now!), I like the idea of doing so, and then accessing it through parallels 9 most of the time. However, it seems that the windows drivers only have access to the Nvidia graphics, and cannot switch to the intel graphics when the extra processing isn't needed, so when running in bootcamp mode, the battery life will suck. Will the same be true in Parallels, or given that this is emulating windows through Mavericks, will it get the full Mac control, allowing it to select intel/Nvidia graphics as it needs.
Anyone else tried this who can give me some numbers on what the battery life is likely to be in both modes?
Thanks,
Nick

parallel is a virtuel machine and don't have direct contact with the hardware with real drivers
it access osx generic drivers it will use the generic virtual machine driver osx provide and it will 100% be up to osx how much battery is used
the no direct hardware assess is also why you can't play games in the virutal machine as it don't use the video card at all

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{quote}If the Firewall was On I would ask if you had set it up as an Exception
http://www.ralphjohnsuk.dsl.pipex.com/page12.html#_Service{quote}
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