There are many complaints about this across different devices; my Note 10.1 w/JB is also experiencing it.
When the screen's off and the phone's idle, Google Play Services has multiple processes running in the background (mainly location services) that knock 3-5 % off the battery life every hour for me. This happens despite me disabling all location services. I've turned off every other background app as a test and this still happens. It's really annoying because Google forces you to download this update and YouTube requires it as well. You can temporarily force stop the different processes by going into running apps but they eventually turn back on again. The wifi icon constantly has the data upload arrow flashing when the processes aren't disabled and this is what drains the battery. I hope Google swiftly addresses this annoyance with a new update.
When the screen's off and the phone's idle, Google Play Services has multiple processes running in the background (mainly location services) that knock 3-5 % off the battery life every hour for me. This happens despite me disabling all location services. I've turned off every other background app as a test and this still happens. It's really annoying because Google forces you to download this update and YouTube requires it as well. You can temporarily force stop the different processes by going into running apps but they eventually turn back on again. The wifi icon constantly has the data upload arrow flashing when the processes aren't disabled and this is what drains the battery. I hope Google swiftly addresses this annoyance with a new update.