Battery charging slow on iPhone 6

Discussion in 'iPhone' started by akash.nu, Aug 11, 2016.

  1. akash.nu macrumors 68040

    akash.nu

    Joined:
    May 26, 2016
    #1
    So as some of you may recall, I got the battery replaced by Apple on my iPhone 6 due to bad battery life and today I've started noticing it seems to be charging really slow.

    In the last 2 and half hours the battery charged up by 22%. That's too slow isn't it?
     
  2. elf69 macrumors 68020

    elf69

    Joined:
    Jun 2, 2016
    Location:
    Cornwall UK
    #2
    my 6s plus is slow to charge.

    im using a 2a samsung mains to usb adaptor from my S7 edge.

    the apple charger says 1.2a so I would have thought it charge faster on the samsung.
    It's not quite as slow as yours but alot slower than the S7 edge.
     
  3. akash.nu thread starter macrumors 68040

    akash.nu

    Joined:
    May 26, 2016
    #3
    I've never seen it charge this slow before to be honest and I'm charging from my Mac right now that outputs at 900 mA as far as I remember.

    Edit - so according to Apple I'm supposed to get the max output from the USB3 port which would be 2900mA. That's similar to using an iPad charging brick I think.

    https://support.apple.com/en-gb/HT204377
     
  4. Newtons Apple macrumors P6

    Newtons Apple

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    Mar 12, 2014
    Location:
    Jacksonville, Florida
    #4
    If you have an iPad charger, it will charge quicker. I just charge mine over night and never have to worry about the speed of charging.
     
  5. akash.nu thread starter macrumors 68040

    akash.nu

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    May 26, 2016
    #5
    I generally charge overnight as well but it seem to have drained faster today probably because I was using it outside so the screen brightness killed it.
     
  6. Newtons Apple macrumors P6

    Newtons Apple

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    Location:
    Jacksonville, Florida
    #6
    iPad charger will speed it up some.
     
  7. akash.nu thread starter macrumors 68040

    akash.nu

    Joined:
    May 26, 2016
    #7
    Yes I do have one but it feels like the phone is genuinely charging slowly compared to how it was before.
     
  8. pnoyblazed macrumors 6502a

    Joined:
    Mar 1, 2008
    #8
    I use the 12W charger and never looked back since
     
  9. Relentless Power macrumors Core

    Relentless Power

    Joined:
    Jul 12, 2016
    #9
    It seems somewhat slow to charge at that rate. But I don't think it's
    Completely abnormal at that rate. If it worsens, then hopefully, at minimum Apple could provide you with a battery replacement.
     
  10. akash.nu thread starter macrumors 68040

    akash.nu

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    May 26, 2016
    #10
    It has started after a battery replacement anyway, so hopefully I'm still within the replacement part warranty that comes with it.
     
  11. Newtons Apple macrumors P6

    Newtons Apple

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    #11
    Could be a bad battery. Apple store or as I remember a 3rd party
     
  12. akash.nu thread starter macrumors 68040

    akash.nu

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    May 26, 2016
    #12
    Nah, Apple Store. I'll give it another chance before booking an appointment.
     
  13. zhenya macrumors 603

    zhenya

    Joined:
    Jan 6, 2005
    #13
    Did you have to do a restore or anything of your data recently? If it's attached to your computer and only providing 900mA then it's conceivable that if the phone is busy with a lot of background processes and/or the screen is also on that it is only providing a small amount of current to charge the battery after it first powers the phone.

    This seems like the most reasonable explanation.
     
  14. akash.nu thread starter macrumors 68040

    akash.nu

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    May 26, 2016
    #14
    No if you read the edit bit, it's supposed to provide the max over USB 3.
     
  15. zhenya macrumors 603

    zhenya

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    Jan 6, 2005
    #15
    I read that page to indicate the maximum is 1100mA over USB 3. Not enough to charge at full rate if the device is consuming power at the same time. Follow the instructions on that page to find out how much it is providing.
     
  16. bhayes444 macrumors 6502a

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    Jul 13, 2013
    #16
    Yes, from what I read on that page the maximum output it can provide is 1100mA provided it meets certain conditions: 1) it is an Apple computer or display capable of doing so (there is no list), 2) the computer or display is awake, 3) the iPhone is connected directly to the computer (no hub), 4) it is the first Apple device requesting additional power (some computers/displays can have more than one port with additional power), and 5) the device actually needs it at that time (not on trickle charge). Otherwise the USB port will put out 900mA max.
     
  17. akash.nu thread starter macrumors 68040

    akash.nu

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    May 26, 2016
    #17
    Yes and my situation satisfied all of those conditions. I was charging it from my Mac directly using an authentic Apple cable when the phone was at 20% charge. There wasn't any other device connected with the Mac.
     
  18. bhayes444 macrumors 6502a

    Joined:
    Jul 13, 2013
    #18
    Yeah, Apple probably needs to look at it then. That sucks you've had two potentially bad batteries. Heck, quote that article if the store folks have any questions.
     
  19. zhenya macrumors 603

    zhenya

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    Jan 6, 2005
    #19
    There's nothing wrong. 1100mA is not enough to charge the phone very fast if it is being used in any way.
     
  20. akash.nu thread starter macrumors 68040

    akash.nu

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    May 26, 2016
    #20
    I hope so. Wasn't using the phone per se but some processes must be running.
     
  21. Alexrat1996 macrumors 68030

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    Mar 29, 2015
    Location:
    Lehigh valley PA
    #21
    What your saying is true I been doing that for years now since the iPhone 3GS
     
  22. BigMcGuire Contributor

    BigMcGuire

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    Jan 10, 2012
    Location:
    California
    #22
    Correct me if I'm wrong but, I believe the "rapid" charging started with the iPhone 5s - being able to charge at greater than 1a. My 6s+ loves my Anker batteries and Anker wall/car chargers that do 3.8+amps. Definitely charges significantly faster than the iPhone 1a power brick that comes with the phone.

    Going from x-70% is rocket fast, then it slows down 80-90, and 90-100% can take some time (slows way down for this). coconutBattery app on Mac shows it trickle charges down to even 100mAh from 90-100%.


    2 1/2 hours to 22% is INSANE, I'd find that slow for even a 500mah power brick (assuming the phone's screen is off).

    Even with my Chinese no-name cable that barely does 1a, my iPhone 6s+ and iPad Mini 4 will charge much faster than that.


    What would I do if that happened to me? Hold Power + Home and restart phone. Plug it in, turn screen off, flip phone face down, and check it again in 20 mins - see if that helps. If not, I'd take it to Apple.

    Charging via my Macbook Air 11 (Early 2015) is very fast.
     
  23. C DM macrumors Westmere

    Joined:
    Oct 17, 2011
    #23
    I believe it was as of iPhone 6.
     
  24. zhenya macrumors 603

    zhenya

    Joined:
    Jan 6, 2005
    #24
    It was the iPhone 6 that first was able to take advantage of higher current chargers, as stated.

    There is nothing wrong with his phone! The rate of charge with a 1a or less charger is completely dependent on how heavily the phone is being used. If it's busy with background processes or the screen is on, that will consume most of the available power from the charger because power is first used to power the phone. Anything left over goes to charge the battery.
     
  25. akash.nu thread starter macrumors 68040

    akash.nu

    Joined:
    May 26, 2016
    #25
    The only issue is that the phone wasn't being used at that time. I hardly use my phone for that high intensity work.
     

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