battery drain

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http://forum.xda-developers.com – hello friend i have evo 3d with stock 4.0.3... my mobile wifi and data always enable... that my my battery work just for 4 hours or maimun 5 hours i always need to put my mobile on charging... is there any kernel .... that have less battery drain.... if u gays know please paste the link thanks in advance... (HowTos)