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iPhone 5 battery life is way worse than iPhone 4

761253 Views 3,607 Replies Latest reply: Apr 19, 2014 11:48 AM by mocho99 RSS Branched to a new discussion.
  • ramone12781 Level 1 Level 1 (0 points)

    Mines reading 3.8v 14.24 mAh on the battery doctor chinese one first reccomended to use.

  • CliffHNZ Level 1 Level 1 (0 points)
    Currently Being Moderated
    Nov 28, 2012 10:04 PM (in response to ramone12781)

    The fact that we are getting different numbers for voltage would lead me to believe that these are dynamic readings. There's no logical reason to post different numbers on different devices outside of Apple's published spec otherwise. I'm just trying to get confirmation from the producer of that app now. Unfortunately I think we're both losing something in translation on the emails. As soon as I have a definitive answer I'll post back here.

  • MR_WIN_0880 Level 1 Level 1 (0 points)
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    Nov 28, 2012 10:26 PM (in response to holdrege)

    On battery Doctor, the chinese version I am getting 3.8v 12.24 mAh as well, but on 360 battery saver app, i am getting the 1440 mAh as apple states.  I think the majority of us are seing those numbers on our iphones 5's. HArd to know which one is accurate.

  • MattRStewart Level 1 Level 1 (10 points)
    Currently Being Moderated
    Nov 28, 2012 10:36 PM (in response to CliffHNZ)

    my iPhone 5:

    3.7 V

    1424 mAh

     

    my iPhone 4:

    3.7 V

    1420 mAh

     

     

    Edit: that is using the Beijing Kingsoft Battery Doctor app.

  • KéKé Level 1 Level 1 (0 points)
    Currently Being Moderated
    Nov 28, 2012 11:22 PM (in response to holdrege)

    I have the same:

    iPhone 5:

    3.7 V

    1424 mAh

  • LEECK78 Level 1 Level 1 (0 points)
    Currently Being Moderated
    Nov 28, 2012 11:39 PM (in response to holdrege)

    On my system status apps.

     

    iphone 5

    3.8V

    1440mAh

  • HwyHawk1976 Level 1 Level 1 (0 points)
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    Nov 29, 2012 12:22 AM (in response to CliffHNZ)

    My main question wld be, y is the Battery Doctor app so close 2 accurate with the wife’s 4S and so far off on the readings of the IPhone 5?? That alone causes consern for me. Then on the 360 Battery Saver app the 4S read 1420mAh which is off by 20mAh where the iphone 5 read 1440 the advertised mAh..

  • tim3k Calculating status...
    Currently Being Moderated
    Nov 29, 2012 1:37 AM (in response to HwyHawk1976)

    I think there is a lot of confusion about the battery capacity, voltage etc.

    Two things:

    1. The battery voltage is not a constant, but linked directly to the battery charge.

    If you take a standard alkaline AA battery and measure the voltage, you'll get 1.6+ v for a new battery and 1.2v for discharged battery. Same applies to any battery, LiPo, Li-ion, NiMh etc

    When the battery in your iphone is fully charged, it's probably close to 4v or even 4.2v, when it's discharged - maybe close to 3.2v or lower. Your smartphone's electronic needs constant voltage, therefore there must be a battery driver (hardware), which has your battery voltage as an input, and outputs constant voltage to the phone's electronic.

    2. The iOS is very closed OS, and there is no way for a non-Apple app to get the hardware readings directly. The only information an app can obtain is what provided by the OS, it means the battery charge in %.

    Now coming to all those battery magic apps, my point is that it's a dud. The app can only guess how is the battery status.

  • LEECK78 Level 1 Level 1 (0 points)
    Currently Being Moderated
    Nov 29, 2012 3:34 AM (in response to holdrege)

    Something is definitely wrong with IOS6.x.x or even the device itself.

     

    On my iphone 5, Camera and App Store were constantly running on background.

    On my iphone 3GS, no apps running except Phone.

     

    My Iphone 5 on IOS6.0.1

    IMG_0037.PNG

     

    My Iphone 3GS on IOS5.1.1

    IMG_2918.PNG

  • Jameson! Level 1 Level 1 (40 points)
    Currently Being Moderated
    Nov 29, 2012 4:23 AM (in response to HwyHawk1976)

    Dumb question of the day here........

     

    1424mah vs 1440mah represents a ~~1.1% difference.   How will this actually impact the total battery life of the phone?   Is panic over this difference, nothing more than chasing a red herring?

  • LEECK78 Level 1 Level 1 (0 points)
    Currently Being Moderated
    Nov 29, 2012 4:31 AM (in response to holdrege)

    Add on to my earlier post, App Store on background is constantly checking updates on whatever apps you have on your device.

     

    Could this be the curlprit?

  • iPhone4Lyf Level 1 Level 1 (0 points)
    Currently Being Moderated
    Nov 29, 2012 4:57 AM (in response to LEECK78)

    Ignore all these battery sizes. They dont prove anything. I got my friend who get 12 hours+ usage to check his out and hes getting the same as you guys. Except, on 3G, he hits about 7 hours usage and on wifi its around 12 or more.

     

    I am 100% convinced that this is an antenna or iOS6 problem. iPhone 4 users are also saying that since they updated to iOS6 their battery has been destroyed.

  • HwyHawk1976 Level 1 Level 1 (0 points)
    Currently Being Moderated
    Nov 29, 2012 6:52 AM (in response to tim3k)

    Volt readings r the same rather I have 10% battery remaining r 98%. From what u r saying is that 3.8v shld fluctuate with the battery losing power?? In every app i used, 3.8v was the constant.. My questions r focused on mAh.

  • tim3k Level 1 Level 1 (0 points)
    Currently Being Moderated
    Nov 29, 2012 7:08 AM (in response to HwyHawk1976)

    I say it from the physics of how the battery works. If your Chineese apps show constant voltage it only confirms what I wrote. What the apps show you is not the "volt readings", but simply the battery specs taken from apple.com

     

    Now, concerning mAh: there is no easy instant way to measure battery capacity. One way is to fully charge the battery then discharge it to zero with constant current. There is absolutely no way for an app to perform such test. Second way is to measure the internal resistance, but it's 70% correct at best. So your 20mAh deviation is definately not measured, but just some random number from an app.

  • HwyHawk1976 Level 1 Level 1 (0 points)
    Currently Being Moderated
    Nov 29, 2012 7:04 AM (in response to Jameson!)

    Dont know guy.. Im not the one posting cries of a "class action suit", lol. I dont know how it wld impact the overall battery life.. I paid $700+ for the phone, I wld appreciate getting every ounce of power that I thought I was paying for..

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