Battery draining faster

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http://androidforums.com – My battery used to last almost two days back when I first got the phone and I wouldn't charge it over night only in the morning till 100% then I would unplug it. Now I just plug it in at night and unplug it in the morning. I'm currently running chameleon rom and my battery drains very fast on stand by as well. As soon as I take it off the charger at 100% it goes straight to 99% and continues to go down at an accelerated pace. So which 4.2 rom is better for battery or what kernel can I flash? Also how do you charge your phone? Overnight or only till 100%? Thanks. (General)