S3 battery drainage

[taneity]

My s3 has recently started draining really fast. I understand I'm using it so it will drain but normally lasts 8-10 hrs on Friday it died by noon. Today it is at 21% and it is only 1pm (this is shown in the last three screen shots) . Used to be good till 5pm. It also said it was fully charged Saturday morning and I unplugged it and looked at Facebook for 15 minutes and it went down 25% then when I plugged it in it went down another 10%(this is shown in the first 3 screan shots)...
Will add to rthis if it keeps happening. Should I take it intp the store?
I keep my data off and keep power-saving mode turned on and normally my screen is set to auto. Turned my screen to almost as low as it can today. Have not downloaded anything new lately.
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[GSDer]

There's quite a variety of screenshots representing different timelines. I'd suggest sticking to one scenario that starts with the battery fully charged and runs long enough to see the battery around 20%.
Please also include a screenshot showing the Screen on detail.
With that said, you did have one series that showed about 6 1/2 hours of usage, ending around 25%. That does seem to be a bit short, but without the screen on time it's hard to tell. Also need to know what your screen brightness is set at.

I keep my screen turned down to the minimum and generally get 10 hours or so of battery life before getting to the 2x% range, with around 2-3 hours of screen on time.

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[taneity]

The first 3 are from the day where lost 25% in 15 min after unplugging it. And the last ones are from the first scenario I described in my original comment. I normally have my screen set to auto. Switched it today to just over minimum. Will post more today if same thing happens

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[anon(5600632)]

I find that the battery life is usually very good, but every few weeks, there's suddenly a day or two of very rapid drain like you're experiencing. Android system, Android OS are often implicated, but I can't tell exactly what's happening. Maps are usually mixed in there as well. It seems that Android/Google are doing some kind of background updating or maintenance.

Other than the Screen adjustments already mentioned, I have found it helpful to long press the home key, look at the RAM usuage and clear the memory a couple of times a day. It also seems helpful to uninstall all the updates to Google Maps, then reinstall the latest version of the app. Otherwise I've not found it really matters what else I do - the activity seems to die down and return my battery life to normal in a day or two.