Originally Posted by charliecc
If you haven't done so already, try turning off Google Now altogether.
Google Now made a clear impact to my battery life. My phone generally goes about 36 hours before I charge it, and after the update, it would go about 24 hours with similar usage.
Turning Google Now off, and it was back to the 36 on average.
I'm guessing the OP has a Verizon phone though, since he is just now noticing JB aspects. The Verizon phone seems to have much worse battery life on average than the GSM one. At least judging by the general threads here.