Restricting apps from accessing location data seems to cause high battery drain. For example, after the Facebook app has been running or is still running in the background, Better Battery Stats reports a higher than usual NetworkLocationLocator with a high number of wakelocks for it. Better Battery Stats also reports that deep sleep time is low, whereas before it would be at least 80% after several hours of the phone being switched on. Switching off "Use GPS Satellites" and "Use wireless networks" in the phone's location settings prevents this battery drain.