Optimizing Battery Life?

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http://androidforums.com – Well I'll get straight into it, no matter which ROM I flash battery life sucks. I've gone from OA to CM7.2 with OC kernel now. Just today I charged my phone fully, took it off the charger and played music ever since. I take a look at my phone and its at 70% after two hours with the screen off. I have no apps installed that uses data in intervals, so I'm not getting why my battery drains so fast. I remember reading people getting over 14 hours of charge meanwhile I don't come close to that. I doubt my battery is faulty, and I am just curious if this is normal battery behavior? Normally m (General)