Iphone X - Laggy when battery hits 1%

Discussion in 'iPhone' started by alisex747, Nov 6, 2017.

  1. alisex747 macrumors member

    Joined:
    Nov 6, 2017
    #1
    Good morning,

    I bought the iPhone X last Friday and I noticed something that did not occur on my iPhone 7 : when the battery percentage hits 1%, the iPhone becomes very laggy, as if the processor was underclocked in order to save power.

    Please note that I do not use the lower power mode.

    Did you notice the same on your iPhone X ? Do you think this normal ?

    Maybe this is a new feature on the A11 Bionic chip since it was not the case on my previous iPhone 7 ?

    Thank you for your feedback.
     
  2. bambooshots macrumors 65816

    bambooshots

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    Jul 25, 2013
    #2
    A lot of things probably act weird with just 1% battery life left.
     
  3. alisex747 thread starter macrumors member

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    Nov 6, 2017
    #3
    THank you but did you specifically notice the laggy animations when battery hits 1% ?
     
  4. bambooshots macrumors 65816

    bambooshots

    Joined:
    Jul 25, 2013
    #4
    I don't usually run my battery down that low, so no, I didn't.
     
  5. rider900 macrumors newbie

    rider900

    Joined:
    Oct 30, 2017
    #5
    I did notice this last night. Glad I’m not the only one, however I had low power mode on. I was testing how much battery usage time I could get out of it, it was laggy animations but only at 1%, strange.
     
  6. 03sho macrumors 6502a

    Joined:
    Sep 19, 2007
    Location:
    UK
    #6
    I noticed this when mine hit 1% the other night. Same thing happens to my MacBook when it is below 5%
     
  7. TheSteves macrumors member

    TheSteves

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    Apr 23, 2015
    Location:
    Planet Earth
    #7

    No never experienced this because I never let my battery go to 1% and then do benchmarking.

    But obviously this is a grave problem and you should return the device immediately.
     
  8. mazdamiata210 macrumors 6502a

    Joined:
    Sep 28, 2014
    #8
    I appreciate sarcasm, but he didn't say he was bench marking anything. I had it happen to me too simply setting up my apps. It was jarring.
     
  9. tromboneaholic Suspended

    tromboneaholic

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    Jun 9, 2004
    Location:
    Clearwater, FL
    #9
    As an aside, running your battery to 1% will eventually shorten its life prematurely. 100% will too. The battery’s life will be longest if you keep it between 40% to 60%. I don’t do that myself, but I keep it in mind when I notice the battery is getting too low and there’s a charger around.
     
  10. Ralfi macrumors 68030

    Ralfi

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    Dec 22, 2016
    Location:
    Australia
    #10
    How many minutes of use do you get from the 1% mark?
     
  11. Newtons Apple macrumors Core

    Newtons Apple

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    Mar 12, 2014
    Location:
    Jacksonville, Florida
    #11
    I would never use my device at 1% battery remaining. Put it on the charger.
     
  12. Technarchy macrumors 604

    Technarchy

    Joined:
    May 21, 2012
    #12
    I bet you are laggy when you are starved and not fed to the point of almost dying.
     
  13. alisex747 thread starter macrumors member

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    Nov 6, 2017
    #13
    OK so it seems to be something which is normal.
    I also noticed this below 5% of my MacBook Pro
     
  14. carlosgeorge macrumors newbie

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    Nov 3, 2017
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    Miami
  15. anubis1980 macrumors 6502

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    Oct 22, 2012
    #15
    My 6splus has always done this.

    grinds to a halt.

     
  16. tromboneaholic Suspended

    tromboneaholic

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    Jun 9, 2004
    Location:
    Clearwater, FL
    #16
    This
     
  17. JonnyIreland macrumors 6502a

    JonnyIreland

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    Mar 10, 2010
    Location:
    Toronto, Canada
    #17
    And when mine gets to 0%, I might as well switch it off = useless
     
  18. Gryzor macrumors 6502a

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    Jun 20, 2010
    #18
    1% battery is something I see maybe once a year...
     
  19. jgelin macrumors 6502a

    jgelin

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    Jul 30, 2015
    Location:
    St Petersburg, FL
    #19
    Well you drained the device to where there was likely a power sag to the processor that created this lag. The processor demands a steady stream of power, at 1% the battery and its circuitry just cannot provide the stable current needed for proper operation.
     
  20. Nozuka macrumors 68020

    Joined:
    Jul 3, 2012
    #20
    not really. it might be showing 1%, but in reality apple won't let the battery run this low. they will turn off the device before this ever happens. it's 1% of the charge they ALLOW you to use.

    and can't agree with the 100% either. my macbook is mostly at 100%, since i rarely ever take it off the charger. after 5 years it's still at like 88% capacity.
     
  21. tromboneaholic, Nov 6, 2017
    Last edited: Nov 6, 2017

    tromboneaholic Suspended

    tromboneaholic

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    Location:
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    #21
    My post wasn’t an opinion for you to agree or disagree with.

    These are scientific facts backed by tests.

    Several stats and statements here to support the facts, starting with:

    “A partial discharge reduces stress and prolongs battery life, so does a partial charge.”

    “Lithium-ion suffers from stress when exposed to heat, so does keeping a cell at a high charge voltage.”

    http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries

    There are other articles out there. This was the first one that came up for me on google.
     
  22. bambooshots macrumors 65816

    bambooshots

    Joined:
    Jul 25, 2013
    #22
    Just watched a review on iPhonedo. This low power test is pretty telling.
     

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  23. alisex747 thread starter macrumors member

    Joined:
    Nov 6, 2017
    #23
    Yes indeed.

    Bottom line is that the CPU may be significantly underclocked when battery is almost empty.

    But I agree with your comments, this is quite unusual to wait to hit 1% before charging the device. Actually I did it to have an idea about the battery capacity of the new Iphone.
     
  24. thevidness macrumors member

    thevidness

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    Nov 1, 2013
    Location:
    Berlin, Germany
    #24
    i experience this 1% battery lag regularly on my 6s plus. _every_ day..
     
  25. timeconsumer macrumors 68000

    timeconsumer

    Joined:
    Aug 1, 2008
    Location:
    Portland
    #25
    At 1% battery my concern wouldn't be if my phone seemed laggy it would be finding a charger or trying to make the battery last longer.
     

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