Battery drains while device is sleeping??? - Galaxy S III Q&A, Help & Troubleshooting

Hello there
I am aware that the Galaxy S3's battery isn't that great, but I have held an HTC One X for a while (which has an even worse battery) and it was actually much better than my S3's. The problem with the S3 is that it drains really hard while the device is actually SLEEPING. Like this morning I got up at about 9 AM and the phone was charging all night so it was 100%, so I decided to unplug the device and leave it till I got back (about 5 hours later) and it was already down to 89% or so. How does that happen? It's supposed to last much longer than that while it is sleeping, correct?
Here are some screen shots from Battery Stats Pro which I believe is the best battery application.
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"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
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The developer of Battery Stats Pro is advertising another application for saving battery, I may go ahead and give it a shot but I remember trying a similar application on the HTC One X before which made things even worse.
I have been on the leaked 4.2.2 for a while now but the battery draining problem has been there ever since I got the phone, on 4.1.2, and I have tried many custom ROMs as well as deodexed 4.1.2, 4.2.1 and 4.2.2 but the problem remains, to a large extent, the same.
Does anyone know what could be causing this? I don't have local warranty because I purchased the device from abroad and I don't want to invest in another battery if it's going to be the same.
Any information and/or advice are much appreciated.
Thank you.

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I forgot to mention that I have read a lot of guides regarding better battery times and modified the settings in order to achieve that, like Auto screen brightness, lowering volume, disabling touch sounds, haptic feed back, vibration, key-tap sound/vibrate and other things. I also changed Facebook's Refresh Interval settings from 1 hour (which I forgot to change) to Never; the only client that I set to Push is my hotmail account because I really need it.

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Do you have a anti virus? They usually keep the four cores working all the time.
Sent from my GT-I9300 using xda app-developers app

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is the charger you're using samsung's original one?

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On many devices i so this and i can tell you that you need to find the problem, but if i see right just try to uninstall Facebook (one of the bigger drainer) and the test it. Any app that try to connect to internet,even if wifi or data connection is off is a battery drainer.

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Thanks for your replies. No i do not have an anti virus. Yes i am using Samsung original charger which is plugged in the wall port directly. Finally i do need Facebook and wouldn't want to in uninstall it but I'll give it a shot. Would i have to remove Facebook messenger as well?

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my facebook runs all the time i connect to internet! that's not a problem. if you are rooted, you can manage start up programs using es task manager for example.

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Use greenify and use betterbatterystats not the you using right now
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TarekElsakka said:
Thanks for your replies. No i do not have an anti virus. Yes i am using Samsung original charger which is plugged in the wall port directly. Finally i do need Facebook and wouldn't want to in uninstall it but I'll give it a shot. Would i have to remove Facebook messenger as well?
Click to expand...
Click to collapse
Uninstall facebook messenger as the normal Facebook app can send massages too, also increase the notifications intervals.
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Castdeath97 said:
Uninstall facebook messenger as the normal Facebook app can send massages too, also increase the notifications intervals.
Sent from my GT-I9300 using xda app-developers app
Click to expand...
Click to collapse
i was having the same problems
i uninstalled the facebook app and just use facebook through a browser.. not that seemed to make it any better .
i also downloaded DS battery saver and set it to aggressive over night(need to manually set it every night though) .. didnt pin point the problem but stops it draining over night

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@negri I did the exact same thing. I set DS Battery Saver to aggressive overnight and it works wonders, although as you said, it does not point out the problem. I am assuming, though, since all DS Battery Saver does is turn off mobile data overnight while the screen is off, maybe Mobile Data just uses a lot of battery and there's nothing we can do about it. It's either that or some applications are constantly connected to the internet all the time.

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Try turning off mobile data/WiFi until you need to use it.
Sent from my Nexus 4 using xda premium

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from another similar post > [Q] Galaxy S3 Battery drain
facebook and others app cause various wakelocks, syncs, etc, causing power consumption and battery drains. (look logs in your monitor battery stats and analysis it)
"i do using greenify too, it's better than traditional battery savers or task killers.
u can use greenify, but to use the real potential of this app, you need root to full hibernation. look the apk developer instructions and tips.
best regards"
you can try too battery saver with profile battery settings based in time or battery level scheduling.
greenify hibernate (just "zzz", not freeze or kill apps) users and system apps (system need root).
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