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I find that battery life depends alot on the scheduler and governor you choose and if you have the phone overclocked. Do you have any software installed that allows you to change it? also what kernel are you running Bloodawn's latest kernel has HK Toolbox included which allows you to change the governor and scheduler. Here is a link.
H4-22m.zip
Here is a link that gives you some info about governors and schedulers.
http://forum.xda-developers.com/showthread.php?t=1369817
You may have to experiment alot to find a combination that's right for you.
the first post of the kernel thread has my recommended settings for HKToolbox if you guys haven't seen it.