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I'm running 12.04. In Windows my pc lasts approximately 7-8 hours but in Ubuntu it seems like 2-3 hours. Battery time is paramount for me, so how can I fix that?

Ubuntu 12.04 i5 2450 Intel HD-300 & nVidia GT540M

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Without going too much into the details, hybrid graphics always constitute a problem. Both of your graphic cards might be active simultaneously. Are you using Bumblebee (drivers for hybrid nvidia graphics)? – Glutanimate Nov 28 '12 at 0:54

ı have the same laptop enter bios choose internal graphic card....

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