[Q] CM9 battery life

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http://forum.xda-developers.com – So I was getting very poor battery life on my Galaxy S II running Cyanogenmod 9 stable. As shown on the screenshot, my battery lasted only about 7 hours it requires a charge. I wasn't running a live wallpaper nor I was running any intense app. I tried to calibrate my battery but there was no improvements. May I know what's wrong? I didn't had some poor battery life while I was on previous roms such as checkrom and even the stock rom. Any helps appreciated. Thank you! :) Attached Thumbnails     (HowTos)