Apple Watch only charging to 98-99%

Discussion in 'Apple Watch' started by i-aamir, May 14, 2015.

  1. i-aamir, May 14, 2015
    Last edited: May 14, 2015

    i-aamir macrumors 6502a

    Joined:
    Jul 7, 2010
    Location:
    UK - London
    #1
    Apologies if this has already been posted on other threads but my AW will not charge past 98% or 99% - It doesn't seem to up to 100% anymore despite being on charge for 3-4 hours at a time.

    It did however reach 100% on the first couple charges but never again! I have completely discharged and charged a few times now and carried out a hard reset but still the same outcome.

    Anyone else experiencing this and if so any solutions?

    Thanks
     
  2. Julien macrumors G3

    Julien

    Joined:
    Jun 30, 2007
    Location:
    Atlanta
    #2
    It is just a meter reading error. With lit-ion there is no such thing as a true 100% or 0% charge. Apple will likely 'fix' the reading to say 100% (even though the charge will stay the same) in a future update.
     
  3. BrianNH macrumors member

    Joined:
    Apr 20, 2015
    #3
    I'm seeing this too every night. If I put it back on the charger it will say 100 after a bit.
     
  4. i-aamir thread starter macrumors 6502a

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    Jul 7, 2010
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    UK - London
    #4
    As in when you check it in the morning it says 99% and then you take it off and put it back on charge to get to a 100%?
     
  5. Robert M. macrumors 6502a

    Robert M.

    Joined:
    Jan 4, 2010
    #5
    I think it has something to do with temperature. Last week it was 90 degrees here and my AC was busted. The watch only charged to 97% and got really warm. It's colder this week, and now it goes to 100%.
     
  6. BrianNH, May 14, 2015
    Last edited: May 14, 2015

    BrianNH macrumors member

    Joined:
    Apr 20, 2015
    #6

    Every morning it says 99 or 98. If I take it off and then put it on the charger for maybe 5 or 10 mins it will go to 100. Heck I'll do it now cause I just woke up and it was at 99 :)

    For the first few weeks it was at 100 all the time, only once did I notice it at 99
     
  7. i-aamir thread starter macrumors 6502a

    Joined:
    Jul 7, 2010
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    UK - London
    #7
    That's interesting as that's exactly what happens with me although I don't put it back on to see if reaches a 100. Its almost as if it reaches 100 whenever the full charging cycle finishes and then starts discharging even with charger still being connected. Odd situation!
     
  8. BrianNH macrumors member

    Joined:
    Apr 20, 2015
    #8
    This is exactly what I feel like happens. This only happens when it's been charging overnight, like there's a timeout. Coincidentally it is still warm though so it doesn't feel like it has shutoff.

    Another data point: the usage shows no time since last full charge which seems to indicate it was (or is) fully charged at some point before I woke up.
     
  9. i-aamir thread starter macrumors 6502a

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    Jul 7, 2010
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    UK - London
    #9
    Thanks and very helpful - I'm going monitor the charge when I get back tonight and see how long it stays at 100 if it ever reaches it! I remember apple saying it should take 1.5 hours for 80% and 2.5 hours for a full charge.
     
  10. btkadams, May 14, 2015
    Last edited: May 14, 2015

    btkadams macrumors member

    Joined:
    Sep 6, 2012
    #10
    When a lithium ion battery used in products like the iPhone, Apple Watch, MacBook, or iPad reaches 100%, the charger stops charging the battery. The battery will naturally drain a bit if it's sitting there on for hours (say, overnight) in the charger. If it drops to 99, the charger is not going to all of a sudden start charging it again. It's bad for the battery as it would constantly be alternating between charging and not charging around 99-100. It will wait until the battery drops down to at least 97 or something like that before it charges a bit more again. This is probably why you see it at 99 in the morning sometimes. It WAS at 100, but eventually went down.

    Of course, this IS a new product, so it's also possible you're dealing with a bug. I just wouldn't worry about it. The best health for a lithium ion battery is to keep it between 40% and 80% battery anyway.
     
  11. spiderman0616 macrumors 68030

    spiderman0616

    Joined:
    Aug 1, 2010
    #11
    I've had that happen a few times now, but most mornings when I put it on my wrist it's at 100. I still have never run it down to dead or even far enough to get it into power save mode, and I am a little worried that I'm damaging the battery by doing that.
     
  12. zmunkz macrumors 6502a

    zmunkz

    Joined:
    Nov 4, 2007
    #12
    Do you have any sources for these claims? I would be interested to read more about it. Are you saying it would be better for battery life to unplug your watch at 80%, if you could get through the day on that charge?
     
  13. btkadams macrumors member

    Joined:
    Sep 6, 2012
    #13
    Check out this link:
    http://gizmodo.com/how-to-take-care-of-your-smartphone-battery-the-right-w-513217256

    I wouldn't bother changing your habits to boost the battery health like that. These devices are made for people to live normal lives and not overthink charging cycles.
     
  14. zmunkz macrumors 6502a

    zmunkz

    Joined:
    Nov 4, 2007
    #14
    Thanks, that was a very informative article!
     
  15. Viper2005 macrumors 6502

    Viper2005

    Joined:
    Dec 2, 2007
    Location:
    Canada
    #15
    I bought a Belkin Conserve Socket so the watch only charges for 3 hours before the socket disconnects the power, to prevent any chance of overcharging!
     
  16. i-aamir thread starter macrumors 6502a

    Joined:
    Jul 7, 2010
    Location:
    UK - London
    #16
    Just to confirm I tested this out last night and this information was correct. I charged my AW from about 60% and it reached 100% and stayed at that level for about an hour before dropping to 99%..98% and so forth despite the charger still being connected.

    So in summary the AW can stay on charge for roughly an hour after it reaches 100% before cutting off and discharging again.

    At least we now know for sure and there is no issue!
     

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