problem with battery !! "android os" .. help please

view story

http://forum.xda-developers.com – Hello every one when i bought the phone the screen was who consume the battery the most but few days ago i have the problem that (android os ) is drain battery fast !!!! i was let my phone before sleep at 100% and after 8 hours sleep i wake and see that battery is 96 % at least that in past but now 88% at most and i see that (android os ) is the problem !!!! please what the problem and how to solve ??!! note the battery life say (good condition ) and i think battery is good but the problem is what call ( android os ) !!! see the pictures : help please (HowTos)