I supposed the following thread is related to this issue: http://forums.androidcentral.com/android-4-4-kitkat/399351-security-storage-killing-battery-help.html
There is a few solution for this problem.
1) Make sure Google Play Store is up-to-date.
2) Clear the Google Play Services cache.
3) Clear the Google Services Framework cache
4) Reboot your phone, just do it.
5) Install a custom stable rom.
Re: Why does my GS6 battery life drain so quickly? + Question Answer
Guessing it's because of the freaking TouchWiz? :D
By the way, this is not the first time i heard of this OS having bug down the battery.
Have you considered using a custom rom?
Buzz Launcher! It's fully customizable and it makes you feel in control of the look.
Although, it is a bit technical and not easy to start off at first.