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iPhone Update 2.2 Drastically Reduces Battery Life

15174 Views 70 Replies Latest reply: Dec 11, 2008 7:13 AM by Ronald Zimmerman RSS
  • Mac Beep Beep Level 1 Level 1 (60 points)
    Currently Being Moderated
    Nov 24, 2008 4:05 PM (in response to ldcjim)

    The reason every body has problems is they have the push mail on. If you are lucky the max you will get is 2.5 hrs.

    ************** You have to drain the iphone battery dead so the battery counter resets to 0000 ***********

    Do this once a month and you wouldn't have any problems. BTW make sure your brightness is set half way or so. You get 4.5-5 hrs use.
    imac 24, Mac OS X (10.5.5)
  • deggie Level 8 Level 8 (44,860 points)
    I have push mail on and I charge about every other day. And you need to power cycle your battery once a month, you don't have to drain it.
    MacPro Dual Core 2.66 Ghz, MacBook Pro 15", iPhone 3G, Mac OS X (10.5.5), AEXs, Red 2G Nano, Red Shuffle, 16GB Touch, 160 GB Classic, White 60GB 5G
  • Childerick Level 1 Level 1 (0 points)
    Indeed, I believe these might have been useful information in normal conditions but here the problem users encounter is not just about battery life but about descent battery life using 2.1 and bad battery life using 2.2 while they did not change any other settings.
    Thanks anyway!
    Imac, Mac OS X (10.5.5), iphone 3G
  • JakeP Level 1 Level 1 (25 points)
    With the 2.2 upgrade I'm actually getting better battery life on my first generation iPhone.
    Go figure.
    MacBook, Mac OS X (10.4.11)
  • Childerick Level 1 Level 1 (0 points)
    Currently Being Moderated
    Nov 24, 2008 4:24 PM (in response to JakeP)
    This might be because the Battery problem in 2.2 is related to 3G usage. Thanks that was useful!
    Imac, Mac OS X (10.5.5), iphone 3G
  • JHeadphones Calculating status...
    Nope. I am having the same problem on a 1st gen iphone ( waited in line even! ). I have been following the other thread (
    Macbook (late) 2008, Mac OS X (10.5.5)
  • Paul Jarrett Calculating status...
    I have never used Push before nor since the 2.2 upgrade...battery life is now 1/2 what it was prior to 2.2. Will try the drain thing, but I'm dubious.

    IMO, this is a major bug.
  • sirwabbit Level 1 Level 1 (10 points)
    Currently Being Moderated
    Nov 24, 2008 6:12 PM (in response to ldcjim)
    I bought the iPhone Friday. Noted my battery was draining fast. I installed 2.2 Saturday and no difference... phone still draining. After reading this post, I did the following:

    Turned off push and fetch. (check email manually)
    Turned off wifi

    I unplugged the phone from charging overnight at 6am MST and as of now the battery is just over 3/4 fully charged. I still made calls, text and checked apps online.

    The one question I have is there an app or location to see the status of your battery besides the icon in the upper right corner?

    iMac 20", Mac OS X (10.5.5), 2GHz Intel Core 2 Duo 4GB RAM 250 GB HD Ext WD 320 GB
  • Eyetrap Level 1 Level 1 (0 points)
    Currently Being Moderated
    Nov 24, 2008 10:12 PM (in response to Childerick)
    I've got the same issue, it has only happened twice. Once the battery was almost full and in the morning (7 hours) it was dead. Then a couple days ago I let it sit for about 3 hours and then it was dead. Kinda weird, seems like the battery just dropped off, not sure what the two instances had in common. My iPhone battery pack saved my butt >
    3G, Windows XP Pro, Love the iPhone!
  • Mac Beep Beep Level 1 Level 1 (60 points)
    Currently Being Moderated
    Nov 24, 2008 10:29 PM (in response to deggie)
    You have to drain the battery dead. After that I always get great battery life the same as for my friends.
    Check for any apps running in the back ground, that can kill the battery fast.

    As for your charging every other day with push mail. You don't have push mail cause if you do your battery would be dead after 3 hrs. Or you don't use your phone that much. I can get 2 days when I don't use it at all. That 2-5 call and 2-5 time been on the net.
    imac 24, Mac OS X (10.5.5)
  • acalatrava Calculating status...
    Currently Being Moderated
    Nov 25, 2008 4:19 AM (in response to ldcjim)
    Hi everyone:

    I'm experiencing the same issue here. I have MobileMe and Exchange with push. With 2.1 the battery lasts at least the whole day, today the iPhone was disconnected from the wall 2 hours ago and my battery is 50%...

    I'm developer and I'm trying to figure out what is the problem. I noticed that the iPhone gets hot when I'm using Safari. After using it is still hot but if I open Safari and REALLY close it (I mean, holding the home button pressed until Safari quits) in a few minutes the iPhone is colder.

    So, I think that there is a problem with Safari that it keep using battery in the background. Please if all of you can test this behaviour maybe we can get closer to the issue...


    Message was edited by: acalatrava
    iMac 24'', Mac OS X (10.5.5)
  • iFidoBark Level 1 Level 1 (0 points)

    While I'm not denying that the out of the box iPhone is an incredible device, Apple omits certain features and functionality that is essential for certain power and business users. MobileMe is sufficient for the casual usual, but there are many of us utilizing exchange push. There are also many of us who need repeating mail alerts so we know we have a new message without having to wake the screen every 5 minutes. Apple limits third party application access to key OS components (a curse and a blessing, depending on your view), hence the choice to jailbreak for some. I have not jailbroken my device as yet, but most f my co-workers have. My biggest concern is that the jailbroken firmware will exascerbate the battery issues many are experiencing with 2.2 If I had to guess though, it is directly related to their fixing pull. Now that the device is actually checking for new email on pull accounts at the set interval when it is asleep, there will understandably be more battery drain. I don't want to JB only to find that it makes an unbearable battery situation even worse!

    <Edited by Moderator>
    16Gb iPhone 3G - v2.2, Other OS
  • iFidoBark Level 1 Level 1 (0 points)
    Push is NOT the cause. I was running push with 2.1 and the battery would last 7-14 hours on one full charge with very mild and minimal usage (almost in standby for most of the day) or 4.5-6 hours on heavy/moderate usage (web browsing, lots of emails, etc.). Both of these ranges have been reduced by 1.5 to 2 hours post 2.2 upgraed. I have done a full drain/recharge.

    Today I will be in a position to turn off my Gmail fetch.
    16Gb iPhone 3G - v2.2, Other OS
  • myni Calculating status...
    Currently Being Moderated
    Nov 25, 2008 6:51 AM (in response to ldcjim)
    After fully charging the battery and then restarting the iPhone the problem with the significantly reduced battery life seems to be gone. Try it out!
    MB, Mac OS X (10.5.4)
  • deggie Level 8 Level 8 (44,860 points)
    You actually are trying to tell me I don't know if I have push mail? MobileMe, and I've received 2 emails so far while typing this. I also check stocks fairly often, weather, man and receive a few calls, play Flick bowling, use the Discovery Cannon, follow college football scores on Sportstacular on Saturday, and sometimes listen to music.

    I do have WiFi off, I only have the MM account on the iPhone, I do not turn the phone off.

    And I get the battery life I stated in the other post with 3G on.

    You do not have to drain a lithium ion battery dead, as I said you just need to exercise it.

    Message was edited by: deggie
    MacPro Dual Core 2.66 Ghz, MacBook Pro 15", iPhone 3G, Mac OS X (10.5.5), AEXs, Red 2G Nano, Red Shuffle, 16GB Touch, 160 GB Classic, White 60GB 5G


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