I'm wondering if anybody in the US is on the new firmware yet. Go to about your device and see if you are on XXU1ANJ4. Mine is still on XXXXANI1. There were articles that the new firmware should help with battery drain.
http://phandroid.com/2014/10/13/note-4-firmware-update/
http://phandroid.com/2014/10/13/note-4-firmware-update/