For those who think battery life sucks after update...

[DvineMzM]

This video might be helpful..

Galaxy Note 2 Tips & Tricks Episode 78: Battery Drain Issues After 4.1.2, Wifi On During Sleep? - YouTube

This guy has tons of helpful YouTube vids for the GN2. He says the battery drain may be due to a change in wi-fi setting after the update. I just followed his suggestion... we'll see if it helps.

 

[Jerry Hildenbrand]

This will have the opposite effect. The cellular radio takes far more battery to operate than the Wifi radio. When Wifi shuts off, data turns back on.