The Samsung Galaxy S3 is a great device, however just as with any other handset the battery life can be an issue. So this is the settings that i implement on my Samsung Galaxy S3 to save battery more juice.
Settings > Wi-Fi > Advanced > Network notification : [UNTICK]
Settings > Wi-Fi > Advanced > Keep Wi-Fi on during sleep : "Always"
Settings > Data usage > Set mobile data limit : [UNTICK]
Settings > Call > Call rejection > Auto reject mode "OFF"
Settings > Sound > Vibration intensity > Set everything to Minimum Settings > Sound > Everything in "System" part [UNTICKED]
Settings > Display > Weather > [UNTICK]
Settings > Display > Brightness > Automatic brightness > Set it to Minimum Settings > Display > Screen timeout > "15s"
Settings > Display > Touch key light duration > "Always OFF"
Settings > Display > Auto adjust screen power > [TICK]
Settings > Location services > Everything [UNTICKED]
Settings > Back up and reset > Everything [UNTICKED]
Settings > Date and time > Automatic date and time > [UNTICK]
Settings > Date and time > Automatic time zone > [UNTICK]
Settings > Motion > Motion activation > [UNTICK]
Settings > Developer options > Windows animation scale > "Animation is OFF"
Settings > Developer options > Transition animation scale > "Animation is OFF"
Settings > About phone > Software update > Everything [UNTICKED].
Its not 'COMPLUSORY' you do everything on the list, but its just gonna remind you if you forgot anything. Its a Just a Guide :)
