Hi. This is my 1st time ever posting 2 a place like this so if I'm doing it wrong please let me know. I've just updated my Galaxy Tab 2 7.0 Wifi to Jelly Bean and I've noticed a significant decrease in battery life. My tablet is not rooted. I know the basics of my Tablet, which is new and my first one, but that's about it. If any one can help me out I'd really appreciate it.