Thanks for the info but I shouldn't have to do any of that. The battery life on my device was absolutely incredible before the 4.2 update. I'm gonna wait for Google to fix the issue and continue to use my device as I always have been. No way am I turning off sync or anything else to save battery life.
there may be an app keeping your tablet awake. i know back when 4.1 was available, i had an app that kept my CPU clocked at 700mhz and just KILLED the battery. same thing may have happened with the 4.2 update.
check into better battery stats and see if you have any partial wakelocks out of the ordinary.
also check
"CPU spy" from the play store to see if your tablet is deep sleeping. i am getting slightly BETTER battery life on 4.2 than i was on 4.1.2 AOKP. really doesn't mattery how many days i can use it, the screen on time on 4.1.2 was about 4 hours. it is now between 4.5 and 5 hours screen on time.