1. blackhawk's Avatar
    In my group, we have 4 iPhones, three are 3GS and one is 3G.

    Every one of the 3GS phones (and one of them twice) has had to undergo a complete Restore as a New Phone process in order to overcome the quick battery degredation issue.

    I have tested a restore from backup and the problem of quick battery drain occurs again. This seems to indicate that there is some software problem that is causing this.

    What makes matters more interesting, is that one of the phones went into this mode but had no new applications installed on it since it was first set up. How can this be? I spoke with a Genious Bar rep about this, he mentioned that the iPhone downloads and uses information over the AT&T network to try to adjust to network usage and the surrounding environment. Is this really true?

    If so, then I pose the following:

    • How many people with 3GS phones have experienced this issue?
    • Could this be a bug?
    • Has anyone figured out what is AT&T downloading to our iPhones that could lead to this battery drain? Or how we can stop it?


    I can already tell that one of the iPhone's battery is starting to get into this mode of battery drain and will have to restore it once again. I would like to figure this out and prevent it from happening. It is pretty inconvenient to have to go through this each time.
    01-06-2010 05:45 PM
  2. flyingember's Avatar
    are they all on 3.1.2? Apple released a battery life patch.
    01-06-2010 06:45 PM
  3. Hack-My-i's Avatar
    these devices are known for battery drainage...its all over this forum. Its one of the biggest complaints we have.

    ...battery life patch doesnt make a difference from what i've experienced
    01-06-2010 07:09 PM
  4. blackhawk's Avatar
    Yes, they are all on 3.1.2 (7D11).
    01-06-2010 07:09 PM
  5. blackhawk's Avatar
    these devices are known for battery drainage...its all over this forum. Its one of the biggest complaints we have.

    ...battery life patch doesnt make a difference from what i've experienced
    I am aware that there are battery complaints, but most of them seem to be centered around newbies not used to iPhone, push notifications and jail broken apps.

    Mine is more concerned about recurring degredation over time that seems to be tied to (potentially) AT&T network.

    What I notice is that my usage time seems to grow over time until it nearly reaches standby time. When it gets to that point, the battery only lasts 4 hours or so, even when the phone has not been used.

    Then I do the restore as new phone and voila, all is right again. This is very troublesome. What is going on that we cannot see?
    01-06-2010 07:14 PM
  6. Hack-My-i's Avatar
    yea i know what u mean and it SUCKS...hopefully the new iPhone will have this issue worked out, SERIOUSLY!
    01-06-2010 07:20 PM
  7. blackhawk's Avatar
    You know, I wonder about something.....

    Are there any t-Mobile users that have experienced the same problem or is this just AT&T?
    01-06-2010 07:23 PM
  8. Hack-My-i's Avatar
    i had tmobile when i had the 2G and i had no battery issues whatsoever but thats a good Q concerning the 3Gs
    01-06-2010 07:25 PM
  9. Earless Puppy's Avatar
    Keeping SSH running in the background will do this, but I am unjailbroken and have had this issue once, I dont think it is a battery issue more an application even though seems to be closed is continuing to run and drains the battery fast
    01-06-2010 07:45 PM
  10. stringbeanie's Avatar
    There is definitely something wrong with the battery in just the last few days. My husband's 3GS, daughter's 3G and my 3GS phone have watched the battery just drop without hardly any use. My phone showed 1 hour and 34 minutes of use and was giving the low battery warning today. I have never had this problem prior to the last few days. I have even tried turning off notifications, push, etc. Nothing is helping. I think this must be widespread given that all 3 iphones at our home have experienced this in the last few days without addition of new programs or increased usage.
    01-06-2010 10:20 PM
  11. flyingember's Avatar
    1 hour and 34 minutes of use is your active use time.

    it uses battery when idle too.
    01-07-2010 09:17 AM
  12. SaberSerene's Avatar
    1 hour and 34 minutes of use is your active use time.

    it uses battery when idle too.
    For me when I do use Mail, iPod I make sure I force quit them after using them, but these apps are made to turn themselves on for easy use. Mail, iPod, Safari, Phone, its there core functionality.
    01-08-2010 11:44 PM
  13. drian's Avatar
    seems to depend which apps you are using, no?
    01-09-2010 01:07 AM
  14. SaberSerene's Avatar
    Right but what if I'm on Edge all day and have my iPhone in sleep mode and the battery reduces. This has happened to me.
    01-09-2010 01:16 PM
  15. jibby#IM's Avatar
    I bought my 3Gs this past November ('09). I live in an area with Edge. Until a few days ago, I could easily get around 4 days of standby time with minimal use. But on 1-12-10, I realized my battery was draining faster. Now it discharges in less than two days without use. I've restored from back-up recently -- no good. So I'm guessing I'll have to restore as a new device.

    In case anyone is curious, yes, I have wi-fi, push, fetch, roll-over, sit, beg,and all that stuff all OFF. The only thing can I say is that putting the phone in Airplane Mode takes care of this problem. I didn't have to do that before and would rather not have to keep doing it. It's a pain and doesn't resolve the core problem.

    Anyone ever pinpoint this thing battery thing that seems to be linked to service? FYI, signal (my bars) seem ok too.
    01-18-2010 10:53 AM
  16. SaberSerene's Avatar
    ok I know why the iPhone 3GS's battery is draining so fast. If you take your phone off the charge at 100% you won't get much out of the battery. It'll drop drastically. What you do to get the most out of your battery is too leave it charging over night. You'll get a lot of use out of your iPhone through out the day.
    01-18-2010 08:25 PM
  17. flyingember's Avatar
    ok I know why the iPhone 3GS's battery is draining so fast. If you take your phone off the charge at 100% you won't get much out of the battery. It'll drop drastically. What you do to get the most out of your battery is too leave it charging over night. You'll get a lot of use out of your iPhone through out the day.
    it will actually only drop depending on the amount of need.

    "a lot" is subjective
    01-19-2010 09:14 AM
  18. jibby#IM's Avatar
    Ok, so I restored as a new device, even changed the name of the phone. I did not sync anything at first. I unchecked the sync options that come up and clicked "Done", or whatever the button says. I shut the phone down, restarted, and plugged it in to the charger until 100% (until the little plug icon came up).

    This did no good. The battery still drains like crazy. Before going to bed last night, I turned "Airplane Mode" on, and I turned the Wireless on (I set it up with my router). So with Airplane Mode on and Wireless on for ~8hrs, I had no drop in the % battery charge overnight. Guess it does a good job of going to sleep with the wireless on.

    I do notice the signal bars fluctuate from 3 to 5 to 3 to 2 to 1. This occurred while watching it for 5 minutes. I even saw the "o" symbol pop up once (as opposed to the usual E for Edge).

    Not sure if it's the phone or the tower. We've had bad weather the past week (lots of cloud cover), but that never seemed to bother the phone much before. I'll probably wait it out for a bit as I don't have an Apple store anywhere nearby.

    I'll try to update this in a few days in case someone's curious.
    01-19-2010 01:53 PM
  19. Hack-My-i's Avatar
    When i charge my phone overnight, why when i pull it off the charger it goes down to 99% instantly?
    01-19-2010 02:25 PM
  20. jibby#IM's Avatar
    And when I referred to "signal bars" above, I was referring to the AT&T radio signal, not my wifi signal. The wifi holds pretty well.
    01-19-2010 04:54 PM
  21. SaberSerene's Avatar
    When i charge my phone overnight, why when i pull it off the charger it goes down to 99% instantly?
    this happens to you too? I thought mine was doing that because of its drop to a concrete ground.. hm but anyway. I reboot my 3GS and that fixes it. oh and whats weird and is pissing me off is I'll leave my 3GS on the charge all night ans wake up with it being at 99%... that really pisses me off..
    01-20-2010 06:43 PM
  22. John T's Avatar
    When i charge my phone overnight, why when i pull it off the charger it goes down to 99% instantly?
    As Apple recommend, monthly recalibration of the iphone's battery should sort this.
    01-21-2010 06:06 AM
  23. jibby#IM's Avatar
    follow up...

    I turned 3G off, and now things are back to normal. However, my town only has Edge, and I had always left 3G on with no problems for the first several weeks I owned the phone. My town is only capable of Edge and the nearest 3G signal is about 30 miles away. I'm not sure why this became a problem all of a sudden.

    I had previously mentioned that I saw my signal switch from Edge to 'o' (GPRS), but then it would switch right back to Edge. Maybe since the Edge signal has been weaker/inconsistent lately, the phone was trying to find a 3G signal too?

    The End....for now
    01-22-2010 12:44 PM
  24. Hack-My-i's Avatar
    As Apple recommend, monthly recalibration of the iphone's battery should sort this.
    HOW DO I DO THIS?? SRY FOR ALL CAPS
    01-22-2010 11:20 PM
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