The battery life for T400 Winsows 7

I just ugraded my new t400 for winsows 7. I noticed that the battery life is at about 02:30 hours even in power saving mode. I use the 9-cell battery. When I was on vista it is about 5-6 hours. Please can someone guide me what is happening here. My battery is dead. nothing to do with the parameter? is it related to the upgrade to windows 7. I just bought my system in June.

I changed the built-in graphical bios and disable the ATI graphics because I heard say that windows 7 do not support switchable graphics. My problem is solved and I new more than 6 hours of battery life.

Tags: Lenovo Products

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