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iOS 6.1.3 battery drainage

255495 Views 992 Replies Latest reply: Mar 22, 2014 2:55 PM by erom43 RSS Branched to a new discussion.
  • AmuricanPatriot Level 1 Level 1 (0 points)
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    May 6, 2013 12:58 PM (in response to Timurjonchik)

    I'm trying to calibrate the battery by running it down all the way to see if that helps.  Yesterday my phone lasted 7 hours and 16 minutes with usage, and this is with using nearly every battery-saving trick in the book.  I would imagine not disabling some features like location services, push notifications, and maintaining a high screen brightness would result in battery life around the 5 hour mark, which is absolutely pathetic.  My second run down test resulted in roughly 7 hours and 38 minutes, which is marginally better compared to my last test.  The interesting thing to note here is that my battery drained from 10% to 3% in less than 10 minutes just from casually web browsing over wi-fi, yet my phone stayed on 1% for well over 25 minutes.  What is the cause of this percentage inconsistency?

    What troubles me now is that Apple hasn't released an update for this issue at all, and makes me greatly hesitant at purchasing the new iPhone when it comes out in a couple months from now if it becomes plagued with these issues.

  • ShujahCh Level 1 Level 1 (5 points)
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    May 6, 2013 1:56 PM (in response to Timurjonchik)

    when your iphone 5 is full charged , try to reset 4 times and you ll see that once your battery will drop from full charged to 95%, or 93 %, then let it charging and you ll get real battery duration.

  • sbailey4 Level 1 Level 1 (5 points)
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    May 6, 2013 1:59 PM (in response to AmuricanPatriot)

    What you describe is the calibration needs performing.  That should get it closer to being correct. The software and actual battery capacity are not in sync so to speak so the calibration should help. Keep in mind that is just an estimate.

  • Jajaba Level 1 Level 1 (0 points)
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    May 6, 2013 2:57 PM (in response to ShujahCh)

    No need to do a reset to calibrate the battery charge %.  All IOS devices calibrate the battery level automatically when doing a 'deep cycle' recharge.  All you have to do is let your battery level get to the point where the battery icon turns red and do a full recharge (Red % varies by IOS device from 10% - 20%).  This will start a deep cycle charge mode. Apple recommends to do this at least once per month to maximize battery cycle life.  The battery level will never be exact as sbailey4 says because the % shown is based on the precise voltage it reads at any given time.  Battery voltage will fluctuate with temperature changes and how much current is being drawn by the device.  Apple samples the voltage level every minute or so and averages the results to calculate the % to display.  This is why you sometimes see a jump in the % indicated.  For example if your downloading a movie the % may drop several points and then jump back up once the download finishes because of the voltage changes, the same for a significant temperature change.

  • AmuricanPatriot Level 1 Level 1 (0 points)
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    May 6, 2013 3:17 PM (in response to Jajaba)

    That's good to know.  At least the percentage reader isn't faulty. It's interesting how Apple doesn't list the maximum battery time for 4G browsing for iphone 4s.  They claim it can last up to 9 hours using wi-fi, yet during my tests I turned on airplane mode and solely used wi-fi for at least half of my total usage time. Based on my tests, the battery didn't last nearly as long as they claim, given the defecit was at least 90 minutes. Having airplane mode on the whole time may help a bit more, but that's not really a viable option when it disables the phone function. 

    I personally think 10-12 hours of battery life while using the phone lightly should be the bare minimum, but perhaps my stats are normal for the iphone 4s.  I suppose I should just hope the new iPhone will improve the battery life.

  • sbailey4 Level 1 Level 1 (5 points)
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    May 7, 2013 5:33 AM (in response to AmuricanPatriot)

    Here you go. They list 3G as 6hrs  (its the same deal) ATT calls their enhanced 3G "4G" for whatever reason. Just confuses folks.

     

    • Talk time: Up to 8 hours on 3G, up to 14 hours on 2G (GSM)
    • Standby time: Up to 200 hours
    • Internet use: Up to 6 hours on 3G, up to 9 hours on Wi-Fi
    • Video playback: Up to 10 hours
    • Audio playback: Up to 40 hours
  • Yorkie29 Level 1 Level 1 (0 points)
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    May 7, 2013 5:36 AM (in response to sbailey4)

    Note the wordss 'Up to'.  Talk time of 20 minutes, 1, 2 or 3 hours or 7 hours 59 minutes ALL satisfy the condition 'Up to 8 hours'.  All ' Up to 8 hours means' is that it won't be more than that.

  • AmuricanPatriot Level 1 Level 1 (0 points)
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    May 7, 2013 9:26 AM (in response to sbailey4)

    Thanks for the information, but there are certain things I'm still concerned with.  I would imagine 4G would still drain the battery a bit quicker, as that network loads data on the Internet marginally faster compared to 3G, even if it is the same deal. Wouldn't it be the same thing in comparing LTE to 4G on the iphone 5?  Whichever networking service loads the data quicker drains the battery quicker?

    What interests me is how Apple goes about testing the battery time for certain things.  They've given us numbers, but not specific information about how they used the phone while testing it.  For example, screen brightness, how many apps are open at one time, push notifications, location services, etc...Those factors are unknown to us. The only thing I really have to go off of is their Macbook Pro battery testing conditions.  They claim they test the battery with 50% screen brightness and casually surfing the Internet and writing in word documents. Applying that here, I simply don't see why I'm not getting up to 9 hours on wi-fi when I used my phone almost entirely on airplane mode. They can't possibly have employed any other battery-saving trick than what I'm doing, as I've essentially disabled all of those unnecessary features with my screen brightness at less than 50%.  I just think I should be getting battery life closer to their projected wi-fi limit when I'm using it as lightly as possible.

  • sbailey4 Level 1 Level 1 (5 points)
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    May 7, 2013 10:24 AM (in response to AmuricanPatriot)

    4G on iPhone 4s is not LTE. Its enhanced 3g (effectively the same as 3G).  Here is info on how Apple does their testing. Not quite the answers you are looking for but.........

     

    http://www.apple.com/iphone/battery.html

  • AmuricanPatriot Level 1 Level 1 (0 points)
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    May 7, 2013 10:34 AM (in response to sbailey4)

    I got some solid info, thanks. This just confirmed my suspicion that my battery is faulty. For the wifi tests they used default settings on the phone. If they get up to 9 hours using default settings and I only get 7 or so hours using battery preserving tricks, then there's a definite problem here. Looks like ill be paying the apple store a visit over the weekend.

  • Jajaba Level 1 Level 1 (0 points)
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    May 7, 2013 10:46 AM (in response to AmuricanPatriot)

    FYI:  Different Wifi protocols, connection speeds and settings on your router can greatly vary the battery life.  Basically the older and slower your Wifi router / signal the more power is consumed.  

  • AmuricanPatriot Level 1 Level 1 (0 points)
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    May 7, 2013 11:13 AM (in response to Jajaba)

    I'm pretty sure my Internet router is top of the line, so that's not it

  • Yorkie29 Level 1 Level 1 (0 points)
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    May 7, 2013 11:25 AM (in response to AmuricanPatriot)

    AmuricanPatriot - And your distance from your router is exactly the same as that as Apple's.  And the surroundings are exactly the same? And any interference to your Wifi (neighbours, appliances etc) is exactly the same? And the webpages accesed are exactly the same (loading times etc)?  In short your are operating in EXACTLY the same controlled conditions that Apple used when doing it's tests?

     

    No?

     

    Think therefore that your results may differ then?

  • sbailey4 Level 1 Level 1 (5 points)
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    May 7, 2013 11:48 AM (in response to Jajaba)

    Yeah and of course they are probably in lab with perfect conditions etc etc. Very subjective and really marketing hype if you ask me.  AmuricanPatriot, can do some math and see where you stand and as stated "up to" leaves a lot of wiggle room for them.

     

    using the specs example below:

     

    6 hr 45 min stby

    1 hr 31 min use

    75% remaining

     

    per spec 6.75/200=3% used for stdby, 1.5/7.5 wifi /3g mix = 20%, so 100%- (3+20)= 76% should be remaining. in this example 75% was remaining so very close to max spec.

     

    Of course use the numbers for whatever partcular type of usage

    • Talk time: Up to 8 hours on 3G, up to 14 hours on 2G (GSM)
    • Standby time: Up to 200 hours
    • Internet use: Up to 6 hours on 3G, up to 9 hours on Wi-Fi
    • Video playback: Up to 10 hours
    • Audio playback: Up to 40 hours
  • AmuricanPatriot Level 1 Level 1 (0 points)
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    May 7, 2013 12:49 PM (in response to Yorkie29)

    No, I'm not claiming my wi-fi connection is exactly the same as theirs during their iphone test.  Interference should be minimal, as it's a password-protected network restricted to the confines of my house.  I suppose distance to the router could be a factor, but I have an airport station of every floor of my house. Regardless, the differences between wi-fi connection/distance shouldn't have much of an impact here considering the disparity of the phone settings.  In other words, the fact that many phone functions are disabled for me (notifications, location services) compared to the default phone settings (more notifications and location services would be enabled in the Apple test) in their test should cancel out any wi-fi network interference on the battery.  That's just my view, though.

    Regardless, I'll be visiting the store this weekend.  Casually messaging people or browsing email in airplane mode seems to drain the battery at least 1% every 3 minutes, if not more than that. Even in sleep mode the phone loses at least 3% hourly.  I suppose my battery may be displaying wear and tear symptoms after a year of owning the phone, but I suspect something else is at fault here.  I'll keep updating my battery times as the days progress.

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