I was checking the options under Privacy -> Location Services -> System Services. After reading some tips for saving the battery life I have turned off Frequent locations, Setting time zone, Popular near me, Location based iAds and Diagnostic and usage. There are more options: Cell network search, Wifi networking, Compass calibration, Traffic. Can I turn-off these as well except for Traffic? I referred to this article but not clear whether turning these off will prevent regular wifi and cell service: http://support.apple.com/kb/HT5594 I am trying to figure out options which are not really necessary and can be switched off to maximize the battery life. Any advice on this?