Possible battery drain found - Location services - Compass

Discussion in 'iPhone' started by bbplayer5, Oct 18, 2011.

  1. bbplayer5 macrumors 68030

    Apr 13, 2007
    If you go into location services, then into the system services... my compass calibration was lit up at all times.. Basically requesting my location 100% of the time. I unchecked it and battery has been far better. I prefer to leave location on because its a hassle to toggle, but this could be an issue.

    Ive never even opened the compass app.

    iPhone 4S
  2. TonyC28 macrumors 65816


    Aug 15, 2009
    Good idea. I'm gonna give that a try. I also turned off Location-Based iAds.
  3. tivoboy macrumors 68040

    May 15, 2005

    What the heck is compass calibration anyways? the compass works fine without it? Is it that IF I go to the southern hemisphere it will adjust accordingly? Or closer to the poles?
  4. JRoDDz macrumors 68000


    Jul 2, 2009
    If you are ever backpacking on Mount Everest.. you're probably going to need this after you reach 28,000 feet. :rolleyes:
  5. jon1987 macrumors regular

    Jan 27, 2011

    I think its to do with working out the difference in true north and magnetic north in relation to where you are?
  6. Tarzanman macrumors 65816

    Jul 16, 2010
    I think it has more to do with the electronic compass figuring out which magnetic field is from the earth and which is an EMF created by artificial sources (circuitry and other electronics)
  7. bbplayer5 thread starter macrumors 68030

    Apr 13, 2007
    Bump - more testing... my battery has been WAY better.
  8. docgerrard macrumors 6502

    Jul 21, 2011
    You mean there was a blue arrow by the compass setting?

    mine has not been on in the past 24 hours apparently but my battery still sucks

    could it still be the problem?
  9. PerplexShyt macrumors 6502

    Sep 1, 2011
    i think it would be "cell network search" that is hogging up the battery more than anything.

    that is the feature that has eliminated the "3g" on or off switch, because it looks for the best signal to switch between edge and 3g.

    Someone verify if this is correct
  10. mcdj macrumors G3


    Jul 10, 2007
    I turned off compass services last night and seem to have much better battery life today.

    usage 1:16
    standby 3:27
    @ 86%
  11. forza69 macrumors 6502a


    Jan 30, 2010
    San Diego, CA
    Just turned off everything in System Services except Cell Network Search. Lets see how it goes.
    Bluetooth: ON
    Wi-Fi: OFF
    Location Services: Siri & Maps: ON; everything else OFF.
  12. nwmtnbiker macrumors 68000


    Apr 5, 2011
    Fidalgo Island
    I also have everything off except cell network search. I also turned off date & time set automatically and local weather.
  13. navindralr macrumors member

    Jun 29, 2010
    I turned off "location based iAds" as well. I never even glance at iAds, so why should my phone waste battery looking for those every now and then...

    will turning off "diagnostics and usage" affect phone performance, or is it just the diagnostic information that is sent back to apple. If it's only that, then I might as well turn that off as well.
  14. sddabrow macrumors 6502

    Oct 7, 2011
    Posted this on batterygate forum, but that thread moves quite quickly.

    What performance does this affect in terms of app functionality?

    Does it only affect compass and maps?
    Will I notice it in maps using it for directions while driving?
  15. noTe on iPhone macrumors member

    Feb 27, 2008
    I turned off the compass location service along with almost everything else and still have battery issues with stand by time
  16. jcmeyer5 macrumors 6502

    Sep 7, 2008
    Good catch. I didn't see the system services all the way at the bottom. Got them off now.
  17. theperipheral macrumors 6502

    Jan 20, 2008
    I don't know which thread I was in yesterday but it listed some things to try to help with battery. I did almost all of them.

    Right now I'm at 82% battery...

    1 hour and 12 minutes of use.

    9 hours and 30 minutes of standby.
  18. autigerMark macrumors member


    Sep 11, 2011
    Daphne, AL
    I let my iphone 4S drain all the way down to 1% then charged it overnight. It was at 99% when I woke up this morning and is still at 99% right now even with some light use.
  19. Jimbo47 macrumors 6502a

    Jun 21, 2010
    I turned off the compass thing to. I watched that page for 5 minutes and it never turned gray, it was always using location. Hope that solves the problem.
  20. JRoDDz macrumors 68000


    Jul 2, 2009
    I believe you are on to something here. I turned everything off in location services except Cellular Networks. I have noticed that the grey arrow was lit up indicating that compass calibration was used in the past 24 hours although I never recall using the compass or even the maps app.
  21. JAWJr macrumors member

    Sep 10, 2011
    Yet for some reason the specs of our phones show we shouldn't take them past 10,000 ft... :confused:
  22. kvizzel macrumors 6502a

    Jan 15, 2011
    hmmm i'm going to try this.

    usually i leave location on, but turn off notifications.

    never really turned off compass and never really cared.

    although my battery isn't to bad. lasts a good day of browsing gaming and etc.
  23. applefanDrew macrumors 65816

    Jul 17, 2010
    I turned off everything except the cell network search and time zone. (I live close to the central/eastern time zone line)
  24. thelookingglass macrumors 68000

    Apr 27, 2005
    Your phone can set time zone automatically via your carrier so there shouldn't be a need to turn this on.
  25. DDar macrumors 6502


    Dec 9, 2007
    What does this compass thing do anyways? Should we turn it on whenever we try and use the maps app or Hopstop?

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