4.0 Battery Drain?

Discussion in 'iPhone' started by dissdnt, Jun 9, 2010.

  1. dissdnt macrumors 65816


    Aug 3, 2007
    I put 4.0 on the other day and I've noticed the battery drains a lot faster then usual. Anyone else experiences this? Or is this placebo because I'm using it more hehe.
  2. dseig001 macrumors member

    Apr 28, 2009
    I'm pretty sure it's placebo, mine's getting better battery life.
  3. JTSmeed macrumors member

    Jun 25, 2009
    Same here

    I updated my 3GS to 4.0 GM and have really bad battery life. The first full charge got me almost 7 hours of standby with about an hour of talk and wifi usage. With this type of usage on 3.x, i could have easily gone a couple of days between charges. I set my only email address that was using fetch to manual and I left three addresses as push. This improved things a little bit. I took the phone off the charger and left it sitting on standby for about 5.5 hours. This drained my battery to about 65%. Still, this is not acceptable. I have a 12 hour road trip coming up in less than a week and don't (yet) have a car charger.

    If anyone has any suggestions, I'd greatly appreciate them.
  4. NT1440 macrumors G4


    May 18, 2008
    Downgrade or reinstall.
  5. pugnut macrumors 6502a

    Jul 1, 2007
    Download and reinstall and set up as a new phone- do not restore from backup. Alos try resetting network settings
  6. Opie macrumors 6502a


    Jun 17, 2008
    I restored from backup after installing 4.0 on my 3gS and mine has stayed the same with maybe a little improvement.
  7. JTSmeed macrumors member

    Jun 25, 2009
    Yeah. I did reset network settings. I was kind of hoping to not set up as new phone. Will I lose my app data by doing this, such as game states and things like that?
  8. Cabrewolf macrumors member

    Apr 2, 2003
    I can add credibility to this. I upgraded to iOS 4 GM yesterday and was just telling my wife that I think my battery on my 3Gs is wearing out all of a sudden because I got really bad battery life today. It didn't occur to me that it could be iOS 4 until I read this thread - hence it is likely not placebo effect.

    I'm not going to worry about it since I'll be getting the new phone, but I may clean install before selling this one.

  9. ugp macrumors 65816


    Jan 7, 2008
    Inverness, Florida
    Maybe it't because the 3rd Party Apps are not setup for Multi-Tasking yet. I noticed they remain in the bottom Apps running bar. You can close them manually by holding down on their icon. Not sure if this will help. I did notice my battery drain faster today than normal but I also think they were working on towers in my area and my phone was working harder for signal than usual.
  10. bradg33 macrumors member

    Mar 13, 2010
    Multitasking = more processor usage = more battery drain.
  11. pugnut macrumors 6502a

    Jul 1, 2007

    Yes, but it will make things a lot better IMO.
  12. NT1440 macrumors G4


    May 18, 2008
    This makes perfect sense! Improper multitasking would definitely kill battery.
  13. mcdj macrumors G3


    Jul 10, 2007
    Wirelessly posted (iPhone: Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A293 Safari/6531.22.7)

    Umm there is no multitasking yet. And apps in the subdock are *not* running in the background.

    I saw a 20-30% decrease today after installing the GM yesterday.
  14. Ivan P macrumors 68030

    Ivan P

    Jan 17, 2008
    I must be one of the few that's getting better battery life. I restored mine from a backup.
  15. JTSmeed macrumors member

    Jun 25, 2009
    Sorry to quote my own post; however, I have seen some results after disabling notifications. Since my last post, about three hours ago, I disabled all notifications and left the phone on standby. Since then, I remained at 54% battery power. So, it might be a particular app or just notifications in general that aren't playing nicely with OS4 GM. I'll add any updates if the situation changes or I can determine that something in particular is the culprit.

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