i own this phone too and i got exactly the same problem not to mention the ram consumption are high too. then i called samsung to clarify this problem. the answer i got "all galaxy phone batteries were also like that, the maximum time for batteries to discharge from full to empty is 2 day by not even touch anything on the phone. for normally usage is about one day."
kind a disappointed with samsung. maybe this not an answer you looking for but what i really want to tell you is just bear with it because u using 'samsung galaxy' phone and of course they do have solution for this problem officially.
Hi, my girlfriend recently got the Samsung Galaxy W and its a decent phone but its battery is terrible. Even when you turn the display down, GPS off, Wifi off, Bluetooth off, etc you can still literally watch the battery go down.
I had the same experience with my HTC Sensation and I got an Anker replacement battery which is awesome and totally solved the problem! The thing is I cant find an anker battery for the Samsung W... now its a new phone so maybe it doesnt exist yet but I feel like the samsung W might use the same battery as other samsung phones. Does anyone know if its true? Anker makes batteries for lots of samsungs so if i could just get one that fits that would be great!