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Possible battery drain found - Location services - Compass

B

bbplayer5

macrumors 68040
Original poster
Apr 13, 2007
3,133
1,159
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
 
Good idea. I'm gonna give that a try. I also turned off Location-Based iAds.
 
what

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?
 
tivoboy said:
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?
Click to expand...

If you are ever backpacking on Mount Everest.. you're probably going to need this after you reach 28,000 feet. :rolleyes:
 
tivoboy said:
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?
Click to expand...


I think its to do with working out the difference in true north and magnetic north in relation to where you are?
 
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)
 
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?
 
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
 
I turned off compass services last night and seem to have much better battery life today.

usage 1:16
standby 3:27
@ 86%
 
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.
 
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.
 
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?
 
I turned off the compass location service along with almost everything else and still have battery issues with stand by time
 
Good catch. I didn't see the system services all the way at the bottom. Got them off now.
 
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.
 
noTe on iPhone said:
I turned off the compass location service along with almost everything else and still have battery issues with stand by time
Click to expand...

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.
 
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.
 
bbplayer5 said:
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
Click to expand...

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.
 
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.
 
I turned off everything except the cell network search and time zone. (I live close to the central/eastern time zone line)
 
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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