QUOTE(zixian96 @ Nov 29 2012, 01:07 PM)
I charged my phone to 100% then plug it off and went to sleep last night ,after a 9hrs of sleep ,my battery drained to 69%
this is the activity of my phone battery , it seems keep active even my screen is off
how to solve this? im bored of keep charging battery

Well, my S3 on stock Msia JB doesn't encounter this problem, a deep sleep after around 10 hours only drain about 1-2%.
When I start to use it around 1-2 week I do face around 10-15% battery drain at sleep time. Well some tweak are needed to improve battery life at JB.
Google Now, totally battery hog as well as resources hog, turn it off.
Google location service, Location & Google search turned off.
Auto sync as well off.
System update via WiFi and Auto check update turned off.
Google map, location setting, turn off Report from this device.
Uncheck auto update from apps installed.
Just my 2 cent to make your S3 a better device, cheers.