After upgrading to jelly bean my battery life was very very poor, had to charge twice a day, and could loose up to 20 % in 2 hours normal usage, searched high and wide for a fix,tried everything until I found this http://forum.xda-developers.com/show....php?t=2012452, worked perfectly, phone has been running normal usage for 12 hrs now and still have 75 % battery, very impressed , might even be better than what I was getting with ics.
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