OK, I have pretty much isolated issues with battery since I found faulty wiring with Samsung USB cables that come with their chargers.
Not everyone will find issues with the USB cable, but the way it is made will be an issue eventually.
One, the cable is very thin and flexible, so many will stretch over a near by wall outlet to use the charger while using the tablet.
Eventually the wire at the connecter on the tablet end gets bent up to 90 degrees, Eventually causing two issues. One intermittent charging. The other a short. I have had both happen since Owning it in November 2013.I almost had a fire, as the plug had a meltdown. Super dangerous!
Now while messing with trimming down apps and memory, I found a few apps that I use have the ability of keeping the CPU and GPU at their highest frequency. They call it boost mode. Even if you have it disabled, toggling it on and off may clear out the setting if you notice your tablet's battery depleting fairly fast and heating up on the left side.
Now for a odd issue with Google apps... I removed the Google Play Music Player, and disabled DRM/Downloads and made a few adjustments to Media Server. What happens is Music Player will cause playback automatically and Media Server will loop into high CPU usage even during reboot. DRM and Media server can cause this condition quite easily. So far Google is not working on a fix for JellyBean. Only KitKat has this fix, all other previous Androids,Gingerbread for example, do not have the issue. Corrupt files or files with _ or strange symbols will cause this loop until the tablet is turned off completely and restarted.