Battery charging on Macbook pro C2D:

mr. amr. a
Posted:
in Genius Bar edited January 2014
Hi,



I have been using my amazing 15inch 2.33 with glossy screen for over a week now and it is awesome. I just noticed today that when I plug in the power adapter, the battery remains at 98% and does not go to 10%. The first 1-2 days, I remember seeing 100% but today, it remains on 98% and it doesnt even show that it is charging. if I choose the setting time, it shows charged but if I change the setting to percentage, it shows 98% and the icon shows plugged in and not charging. Is anyone else seeing it happen? Any ideas to how to fix this?



Thanks.

Comments

  • Reply 1 of 5
    gwoodpeckergwoodpecker Posts: 367member
    This is perfectly normal. To avoid too many charging cycles, your MacBook Pro will only start recharging the battery once the level falls below 95%. So whenever it falls below, it will be charged again to 100%.



    http://www.apple.com/batteries/notebooks.html



    Edit: Or do you mean your notebook is not charging at all when the level is 10%? (or was that a typo?)
  • Reply 2 of 5
    mr. amr. a Posts: 32member
    Quote:
    Originally Posted by gwoodpecker


    This is perfectly normal. To avoid too many charging cycles, your MacBook Pro will only start recharging the battery once the level falls below 95%. So whenever it falls below, it will be charged again to 100%.



    http://www.apple.com/batteries/notebooks.html



    Edit: Or do you mean your notebook is not charging at all when the level is 10%? (or was that a typo?)



    Thanks for the response..It is charging, I just didn't know that it doesn't start unless it is less than 95%...I guess, 1 question is that why does it remain on 98% though. It was low, then it started charging, got charged till 98%. Just curious.
  • Reply 3 of 5
    gwoodpeckergwoodpecker Posts: 367member
    Ah, I see. You will have to do a so-called calibration cycle once in a while:

    http://docs.info.apple.com/article.html?artnum=86284



    And also perhaps a PMU reset first:

    http://docs.info.apple.com/article.html?artnum=303319



    Then your MBP will fully charge up to 100% again.
  • Reply 4 of 5
    clairbearclairbear Posts: 1member
    Hi



    My MacBook pro, which I got today secondhand from a very reputable apple person and family friend, is only 32% charged. i have plugged in the power adapter, which is plugged into the wall, but my laptop is still 'not charging'. Earlier, the light on the cable from my power adapter was green, now it's not on at all.

    Any advice from anyone?!
  • Reply 5 of 5
    jupiteronejupiterone Posts: 1,564member
    Quote:
    Originally Posted by Clairbear View Post


    Hi



    My MacBook pro, which I got today secondhand from a very reputable apple person and family friend, is only 32% charged. i have plugged in the power adapter, which is plugged into the wall, but my laptop is still 'not charging'. Earlier, the light on the cable from my power adapter was green, now it's not on at all.

    Any advice from anyone?!



    The charger is not getting power. Is it properly plugged in? (The weight of mine sometimes pulls it part way out of the outlet.) Have you tried another outlet? Can you try another charger?
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