Battery life on iPhone 4

Discussion in 'iPhone' started by pango1in, Jun 27, 2010.

  1. pango1in macrumors newbie

    Joined:
    Apr 28, 2008
    #1
    Love the iPhone 4 - hope they sort out the signal problem - but that's not my question.

    Since receiving my iPhone, I have fully charged and discharged the battery (took some time to discharge :)). I then charged it to 100% again.

    It was 100% charged by yesterday evening. I caught up on Angry birds for a 1-2 hours, then went to bed. When I woke up this morning, the charge was down to 42%. Ok, why's that?

    I checked the "Usage" section and the phone has been on standby for 12 hours and being used for 11 hours. Eh? How come? It has been about 12 hours since full charge. This did not happen with my iPhone 3G.

    I have some push notifications on, I think, FarmVille (pls don't flame for that....), Facebook, ebay, MSN Messanger and perhaps a couple more. I'm also in a poor signal area, but I don't think my phone was struggling to get a signal all night (had one to two bars GPRS).

    Any ideas what's "using" my phone and eating battery life?



    I don't want to have to restart my phone every time I go to bed... just to maintain battery.
     
  2. cperchard macrumors 6502a

    Joined:
    Jun 15, 2010
    #2
    if it's actually been in use 11 of the 12 hours then i'm not surprised it's down to 42%!! Mine's been standby for 1 day and 11 hours.....of which it's been in use for 6 hours (most of that being wifi and games) and i am down to 20% now which i am extatic about.....i've been trying to kill it so i can do a full discharge but the thing just wont die quickly for me at all, which is awesome!!
     
  3. gehrbox macrumors 65816

    gehrbox

    Joined:
    Jul 5, 2007
    Location:
    Charleston,SC
    #3
    I put mine on the charger every night. Notifications will eat into battery life, as will location services and mail checking interval.
     
  4. gehrbox macrumors 65816

    gehrbox

    Joined:
    Jul 5, 2007
    Location:
    Charleston,SC
    #4
    His original post said he had a full charge, played angry birds for a couple of hours then went to bed. When he woke up it showed 11 hours of usage.
     
  5. cperchard macrumors 6502a

    Joined:
    Jun 15, 2010
    #5
    yea guess i misunderstood a lil bit......does seem strange tho....i've had no problems where the usage goes up over night even if i keep everything in the multitasking running.....but i do tend to close them all after i've finished using it, just in case.
     
  6. Zaft macrumors 68040

    Zaft

    Joined:
    Jun 16, 2009
    Location:
    Brooklyn, NY
    #6
    you have 4 apps using push and are wondering why your batt life went down?
     
  7. JonB3Z macrumors 6502

    Joined:
    Jun 23, 2009
    #7
    Did you leave an app running?

    My IP4 was at 100% when I went to bed last night. Now, 8 hours later, it's at 99%. So it's not an inherent problem.
     
  8. germanjulian macrumors regular

    Joined:
    Jun 10, 2009
    #8
    strange no ideal. Try again :)

    I have push on and location services. I do switch 3g of every night as my room has very poor reception and does suck battery but when I woke up this morning after 6 hours standby and 30 minutes usage I have 98% battery left :p
     
  9. cperchard macrumors 6502a

    Joined:
    Jun 15, 2010
    #9
    wow cool.....i think mine goes down about 4% but i leave push on....do u turn yours off? or any other tips?
     
  10. gehrbox macrumors 65816

    gehrbox

    Joined:
    Jul 5, 2007
    Location:
    Charleston,SC
    #10
    The multitasking in iOS 4 is pretty limited. Apps have a max of 10 minutes to finish what they are doing when they lose the screen before they are put to sleep. Audio streaming and nav apps are the only major exceptions. If it was a nav app his battery would have been dead long before morning. An audio streaming app is about the only kind that would roll up that much usage indicated unless messages or notifications are coming in volume.
     
  11. JonB3Z macrumors 6502

    Joined:
    Jun 23, 2009
    #11
    I live practically underneath a cell tower, so it takes like no power to operate the phone unless an app is running or the screen is on.
     
  12. Eso macrumors 68000

    Eso

    Joined:
    Aug 14, 2008
    #12
    This was a well-documented issue at the release of the iPhone 3GS.

    You need to restore the iPhone and set it up as a new phone (do not restore from a backup).
     
  13. pango1in thread starter macrumors newbie

    Joined:
    Apr 28, 2008
    #13
    Constructive comments please.

    I understand that push apps eat battery, but not 58% in 12 hours. I understand that fetch eats battery life, but not 58% in 12 hours, especially as I have wifi on in the house. If you read my OP then you'll see that the phone has been in use 11 out of 12 hours - all the time I was asleep. That's the problem...:rolleyes:

    I expect it is down to some application not quitting. Since I only really used Safari, Mail, Messages and Angry Birds before bed, one of them can't be quitting properly (regardless of how multitasking is putting it to sleep).

    I will check and report back.
     
  14. Eso macrumors 68000

    Eso

    Joined:
    Aug 14, 2008
    #14
    Again, this was a problem with the 3GS before there was even such a thing as multitasking on the iPhone. This will stop the moment you restore the phone as new.

    You might also try to "reset all settings" in the settings app. I seem to recall this working for some users, but not all. This has the benefit of being quicker and preserving all the app data, but it may not reset the issue that is causing the usage times.
     
  15. pango1in thread starter macrumors newbie

    Joined:
    Apr 28, 2008
    #15
    Sorry, didn't see your response before posting - was posting my own... :eek:

    I did find something on that on the internet, but was reluctant to do it, as it would mean losing texts, settings etc and take up a lot of my time!
     
  16. alecgold macrumors 65816

    alecgold

    Joined:
    Oct 11, 2007
    Location:
    NLD
    #16
    first, you didn't have play/gps in the bar active I guess?
    If so, you had an active app that didn't quit all night.

    otherwise, there would have been an app that got hung.
    I would try a restart right now and then charge it up to 100% and look
    again tomorrow. If it does do it again, it looks like something you use pretty often gets stuck somewhere.
    Also, you can download iInfo and look what is still active. I have bejeweled2 that keeps active and omnifocus that keeps up. I would suspect one of those programs to be responsible.
     
  17. pango1in thread starter macrumors newbie

    Joined:
    Apr 28, 2008
    #17
    Resetting all the settings seems to have worked. I think Angry Birds wasn't quitting properly...

    Thanks for the help.
     
  18. Stankonia macrumors regular

    Joined:
    Jun 4, 2009
    Location:
    Denver, CO
    #18
    I've been having the same problem even with notifications/push turned off. Just tried resetting all settings, so let's see if this helps.

    Restoring as a new phone will be a last resort since I've got some text messages that are sentimental that I really don't want to lose (from my mom before she died)
     
  19. jbachandouris macrumors 601

    jbachandouris

    Joined:
    Aug 18, 2009
    Location:
    Upstate NY
    #19
    I have battery issues as well. I charge the phone, unplug the charger, power off (not standby) the phone, and go to sleep. When I power it on, morning one=56% and morning two=61%. Notifications are not turned on and shouldn't a full power off prevent those anyway?

    I have tried a reset, then a restore as directed by Apple Tech Support.

    Question is erase all settings included in a restore or do I have to do an erase all settings before I perform a restore. Call me crazy, but I want to keep my Launch Day phone if possible.
     
  20. PhoneI macrumors 68000

    Joined:
    Mar 7, 2008
    #20
    Hmm, why would 4 apps use any more bandwidth than 1 app? There is only 1 connection maintained to the apple push server.
     
  21. telarmago macrumors member

    Joined:
    May 19, 2010
    #21
    I'm losing 20% per night in standby; this is the 3rd straight night this has happened. This happened after a complete restore in airplane mode, no wifi, no exchange or email, no notifications, zero 3rd party apps, and only settings and phone in the tray. The only thing I can think of is when I go to general->settings->network, internet tethering is spinning... Anyone else experiencing this? Even better, anyone else found a solution?
     
  22. Hans Brix macrumors 6502

    Joined:
    Jun 19, 2010
    #22
    My wife's phone is experiencing the same issue. I just tried "Reset All Settings". Hope that works.
     
  23. M.Capz macrumors member

    Joined:
    Nov 16, 2005
    #23
    I'm in the same boat... Very annoying.
     
  24. hockeydude35 macrumors member

    Joined:
    Jun 25, 2010
    #24
    Yeah, I feel like my battery is draining quicker than it should be and is also reporting a higher usage time than I actually had. Yesterday, my battery dropped to around 42% by the evening and it was reporting just over 3.5 hours of usage. I don't really think I used the phone more than an hour throughout the day, so I'm a bit concerned.
     
  25. ntrigue macrumors 68040

    ntrigue

    Joined:
    Jul 30, 2007
    #25
    Just chiming-in to make sure everyone with issues does a Restore as New.
     

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