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  • w7ox Level 4 Level 4 (2,385 points)
    msm_09 wrote:
    The car charger was recomended by o2. Anyway the battery ended up totally dying in the car, the started charging. The charger worked in another car too so I doubt its the problem.


    There appear to be a number of charging devices which worked with iPods and 2G/3G iPhones which don't work with the 3GS. Some change in the interface has been mentioned. So when you say it worked in another car, *was that with a 3GS*?

    O2 recommendation does not make it a slam dunk. Even Apple is currently selling accessories designated as for the 3G/3GS which don't work with the 3GS.

    Phil
  • Neil Ducoff Level 1 Level 1 (15 points)
    Had my 3Gs 32gig for just over a week...upgraded from original iPhone. Could not believe how fast the battery drained, especially compared to my 2 year- iPhone. Been reading all the posts and tried a restore from backup with no change in battery drain. I had to charge the 3G before the end of the day.

    The fix: I did a "restore" to factory settings (not from backup). I reinstalled all email accounts, software, contacts, tunes and photos. Set preferences as I like them ... With 3G on.

    RESULT: First time I got through a day with 30% charge left. Did email, surfed web, made some calls, played some games. The battery use is now close to what I expected with 3G.

    Hope this helps others with poor battery performance. It's clearly a bug in the "restore from backup" process.
  • sum1quiet Level 1 Level 1 (5 points)
    I think I agree there is some kind of bug with the restore from backup process. It's such a pain to keep having to redo all my settings though.
  • Allan Lee1 Level 1 Level 1 (0 points)
    I am now learning to distrust the battery percentage indicator. It tends to go from 100% to 80% rather quickly.

    After completely draining battery power twice, my last full charge has now lasted 2 days and 2 hours with about 6 hours of usage. I think draining battery power completely and then charge as long as possible somehow extends battery life...turning off WiFi and Bluetooth, etc. until I need them probably also helped.

    The last 10% of charge has lasted about 10 hours now. Most of the time it's on sleep mode, but it is still more than I ever expected, considering a few days ago I drained the battery within half a day while in a building with weak signal.

    I don't think I need to exchange this iPhone for another one anymore.
  • Lawrence Finch Level 7 Level 7 (30,645 points)
    It involves the Restore from Backup process, but it isn't the process itself. What causes it is corrupt data in the backup that you are restoring. My guess is that it is fields that weren't used in earlier versions and had random data in them. Those fields are now used and the random data is messing up the app that uses it. Which is most likely mail.app, but may be Safari also.
  • Network 23 Level 6 Level 6 (11,870 points)
    yakapo wrote:
    My phone is not draining as fast as yours but the battery life is nowhere near what my 1st gen phone was. It's lost 10% of it's charge just sitting in standby for a few hours. By comparison my 2 year old 1st gen phone has been sitting for 3 DAYS and is still around 65-70%.


    I have found that if the 3GS is used like a laptop, you will get laptop battery life. It seems to do well in Standby.

    I pulled my phone off the charger at midnight. It reports standby of 11 hours 33 minutes, Usage of 48 minutes (there was one 6-minute phone call in there, the rest was browsing).

    The current percentage is 88%.

    I have WiFi on and Location services, Bluetooth, and 3G off. I find it easy to leave Location off because if you try to use a Location service it will simply ask if you want it turned on.

    Since the phone is technically on when in standby, all the services it uses continue to run. I believe part of my now somewhat acceptable battery life is due to dialing back background updates in various applications in addition to the shutting off of services I seriously don't need for most of the day.
  • hsgehlar Level 1 Level 1 (0 points)
    Thanks, I had a same situation as yours I restored from original iPhone. I went to Apple Store Genius Bar and I told the tech I restored from backup, He said that doesn't matter. I was thinking of doing what you did. I will that today. Thanks...
  • Bret Kellihan Level 3 Level 3 (755 points)
    aml2009 wrote:
    I am now learning to distrust the battery percentage indicator. It tends to go from 100% to 80% rather quickly.

    After completely draining battery power twice, my last full charge has now lasted 2 days and 2 hours with about 6 hours of usage. I think draining battery power completely and then charge as long as possible somehow extends battery life...turning off WiFi and Bluetooth, etc. until I need them probably also helped.

    The last 10% of charge has lasted about 10 hours now. Most of the time it's on sleep mode, but it is still more than I ever expected, considering a few days ago I drained the battery within half a day while in a building with weak signal.

    I don't think I need to exchange this iPhone for another one anymore.


    I had the same battery problems and also did the clean restore. I've been using the System Activity Monitor app to track the CPU usage. Even after a clean restore and re-loading apps / contacts the battery still drained quickly and I noticed about 25% constant CPU usage. I went ahead and let the battery drain until it shut off and then did a full charge over night. This morning it's reading about 1% CPU usage and the battery drain has been much better.

    The odd thing is I had tried shutting the phone down and restarting it hoping it would reduce the CPU usage by killing whatever was running constantly. Powering down and restarting twice had no effect, but letting the battery drain until shutdown somehow fixed it...
  • jenmeg1 Level 1 Level 1 (0 points)
    I purchased the new iPhone 3GS the day they were released 6/19/09. I waited 2 years to get an iPhone and looked forward to using it. From the start I noticed the battery would only last about 12 hours, but attributed that to trying all the functions out on my new 'toy'.

    But after the first week the phone was usually kept in standby mode while I was at work and I usually only get two or three calls a day on it at most. It would come off the charger at 6 in the morning and by 10AM the battery was down to 85% and by the time I left work at 3PM it was about 30%. I put all the suggested settings I found on the Apple web page in to prolong the battery life, but this didn't seem to help.

    After two weeks I returned to the Apple store yesterday and they ran a diag on the iPhone. The tech said he found the phone has been dropping many calls. But I don't get many calls on my phone so I don't know what he meant by that. He asked if I wanted a new phone and I said yes. He said it was to be expected these phones to use more power and I said I expected the phone to last at least a full day without being used. The fact they gave me a new phone gives me the impression that something is wrong somewhere.

    So far after only 1 day it seems the new phone is holding a charge better, but I will report back on this after a few weeks to see if it stays that way.
  • sparkle01 Level 1 Level 1 (0 points)
    I had the same problem after the download but since turning the Fetch new data too off in email settings the battery life is better than ever.
  • jenmeg1 Level 1 Level 1 (0 points)
    After two weeks using my new 3GS iPhone that replaced the one I purchased on 6/19/09 I am happy to report my original battery issue has not reappeared on the new iPhone.

    After a full day of use I usually have 55 to 65% of battery life left. I turn my iPhone off at night and can get another day of use out of it before it goes on the charger.
  • allen099 Level 1 Level 1 (30 points)
    What's your usage like, jenmeg? Do you do much email checking, or is it just internet/audio during your commute and in the evenings?

    Over on one of the other discussions, we are running this other test to see whether there's any consistency. If you, or anyone else would like to participate, check out the test at the link below, and let us know on that forum what you get. It's a 8-hour audio test on repeat with certain criteria, so it's best to run overnight (i'd recommend).

    http://discussions.apple.com/message.jspa?messageID= 9852581#9852581

    Good luck with the new iPhone!
  • jenmeg1 Level 1 Level 1 (0 points)
    I would call my use of the iPhone as 'moderate'. It's turned on at 6 in the morning and it's on while I'm at work till 3:00PM. Because of the building I work in, I cannot get any service on the iPhone. But when I'm in an area where I get service, I check my e-mail and browse the internet. I do check my e-mail about 6 times a day but at least double that on Saturday and Sunday's when the iPhone becomes my primary means of communication. I shut the phone off at night when I retire.

    I do not receive or make many phone calls on the phone. I would say my total usage for a months use to be well under 200 minutes. I have used it for playing music and have sent photos to family and friends at times.

    I would like to take part in your test and will check out the link you sent.
  • allen099 Level 1 Level 1 (30 points)
    If you get no service in your building, that will save a ton of battery, since the iPhone doesn't have to maintain a connection to the towers. That definitely explains your good battery life .
  • Janeway777 Level 1 Level 1 (0 points)
    I haven't had a chance to read through all the posts, but just based on the first post:

    My phone was fully charged this morning when I left for work, it's now been three hours later and it still has a full charge.

    I'm not experiencing this battery problem (although I wish I were, it'd be better than not being able to maintain a single phone call). Weird...

    Tiffani

    EDIT: Just had a quick thought -- at the last place I worked there was a 1st floor, ground floor, and basement floor. Those on the basement floor had no signal. Those on the 1st floor had signal, but those on the ground floor were constantly bouncing back and forth between the two -- it KILLED their battery life. The phone was constantly searching for signal and it was a big drain on battery life. Maybe this is happening to some of you as well...?

    Message was edited by: FireflyKaylee