Ok, I know the "screen" thing is usual. . no issues. Noticed that the Android OS/kernel is being the top notch source for eating my battery. left it at 80% upon sleeping.. phone locked. upon waking up its now 63%!!! 4.3 update was completed months back.. and i am not sure if this is the culprit.. using GSAM battery monitor.. and yes, it shows that Android OS being the top consumer. . . using Battery doctor.. not sure if this really helps.. any similar experiences?? btw, I am just after SMS for the entire day.. a bit of facebook for 10 minutes at night..