MacBook Pro Battery Drain Overnight

Discussion in 'MacBook Pro' started by jameronforever, Jan 27, 2016.

  1. jameronforever, Jan 27, 2016
    Last edited: Jan 27, 2016

    jameronforever macrumors newbie

    Joined:
    Jan 27, 2016
    #1
    Hello, world!

    I recently noticed that my 2015 13" rMBP loses about 1-2% of battery life overnight. Previously my Mac retained 100% charge overnight. Power Nap, Wake for Wi-Fi network access, and Bluetooth are all disabled. I have also tried resetting the PRAM and SMC, and as well as disabling Wi-Fi before putting my Mac to sleep, however the battery drain is still there.

    I just checked the console log and this is what I see. I put my Mac to sleep at 1:52 AM and it woke up at 4:52 AM.

    [​IMG]

    This is what I see when I type "syslog -k Sender kernel -k Message Req Wake" into the Terminal.

    [​IMG]

    I'm assuming there is a correlation between my Mac waking up from sleep and the battery drain? Any help would be much appreciated.

    Thanks!

    Edit: Forgot to mention that I am currently running OS X El Capitan 10.11.2
     
  2. T5BRICK macrumors 604

    T5BRICK

    Joined:
    Aug 3, 2006
    Location:
    Oregon
    #2
    To be honest, 1-2% is pretty insignificant. I'd just turn the percentage indicator off and charge your Mac overnight.
     
  3. JTToft macrumors 68040

    Joined:
    Apr 27, 2010
    Location:
    Aarhus, Denmark
    #3
    - What sort of question is this?

    That's completely normal. If that 1 per cent is important to you, shut down instead of sleep.
     
  4. jameronforever, Jan 27, 2016
    Last edited: Jan 27, 2016

    jameronforever thread starter macrumors newbie

    Joined:
    Jan 27, 2016
    #4
    So there is nothing out of ordinary then when to the logs? How come I had 100% battery life before? I wanted to apologize for asking such a dumb question. I'm still learning how to use my Mac.
     
  5. JTToft macrumors 68040

    Joined:
    Apr 27, 2010
    Location:
    Aarhus, Denmark
    #5
    - I wouldn't say there's anything unusual, no. It's not a dumb question, just unimportant. Unless you have a specific reason to think there's something wrong with your machine, I would trust it to behave as it's supposed to unless you see something completely out of whack.

    I'd put the change down to a change in software or sheer coincidence, or even a change in ambient temperature. Nothing to worry about.
     
  6. dilutedq macrumors regular

    Joined:
    Jun 22, 2010
    #6
    Dude my surface pro was losing 10-15% over night. 1-2 is awesome.
     
  7. jameronforever thread starter macrumors newbie

    Joined:
    Jan 27, 2016
    #7
    OK, thanks for the info!
     
  8. bahndoos macrumors 6502

    bahndoos

    Joined:
    Jul 9, 2010
    #8
    1-2% overnight while sleeping is fine, even better than Apple's own rated time of 30 day standby, since Haswell architecture. The math is roughly 100%/30days= 3.3% per day on sleep. Thats what you can expect to lose per day. So your sleep loss is pretty good actually.

    For even less loss, shutdown the computer overnight.
     
  9. jafingi, Jan 29, 2016
    Last edited: Jan 29, 2016

    jafingi macrumors 65816

    jafingi

    Joined:
    Apr 3, 2009
    Location:
    Denmark
    #9
    Your Mac wakes up to check the battery. If it's getting low on battery, it would dump the memory on disk, so you wouldn't loose data when there's no more power.

    And even if it didn't wake up, it still uses power to keep a current in the memory etc.

    It's perfectly normal.
     
  10. jameronforever thread starter macrumors newbie

    Joined:
    Jan 27, 2016
    #10
    Wow, I did not know that! Thanks for the info!
     
  11. snaky69 macrumors 603

    Joined:
    Mar 14, 2008
    #11
    It surely wasn't 100% before, you probably only just noticed it now.

    Sleep mode uses power, it keeps RAM powered to let you start back off where you finished. A drain of roughly 1% per hour isn't unheard of and is 100% normal.
     
  12. Mixolyd macrumors member

    Mixolyd

    Joined:
    Jul 10, 2014
    Location:
    Oregon
    #12
    I found a fix here http://apple.stackexchange.com/ques...-consumes-10-battery-overnight-with-the-lid-c

    and more details about it here https://discussions.apple.com/message/30869802#30869802

    You have to turn SIP off, then do ioreg -l | grep IOPlatformFeatureDefaults and look for corresponding file in /System/Library/Extensions/IOPlatformPluginFamily.kext/Contents/PlugIns/X86PlatformPlugin.kext/Contents/Resources

    Right click on file, get info, and change permission for Everyone to read and write. Then change these values with texteditor

    <key>TCPKeepAliveDuringSleep</key>
    <false/>
    <key>NotificationWake</key>
    <false/>
    <key>DNDWhileDisplaySleeps</key>
    <true/>

    Finally, reboot.

    I'm reporting the bug to Apple. Please do the same so they fix it. Whatever changes you make will probably be overwritten by any updates so they'll need to fix it permanently
     
  13. precision01, Feb 7, 2017
    Last edited: Feb 7, 2017

    precision01 macrumors member

    Joined:
    Oct 16, 2014
    #13
    Thanks a lot, Mixolyd!
    This also solved the battery drain for me.

    Now I'm wondering: Could it be the case where some macbooks are software locked to prevent "Do not disturb" to work properly?

    For you guys that said that do not have any battery drain issues, can you please run that terminal command: "ioreg -l | grep IOPlatformFeatureDefaults" and post here the result?

    In my case, changing energy and do not disturb settings had no effect on those keys. They were always the same, no matter the settings:


    <key>TCPKeepAliveDuringSleep</key>
    <true/>
    <key>NotificationWake</key>
    <true/>
    <key>DNDWhileDisplaySleeps</key>
    <false/>

    Shouldn't those keys change when toggling energy and do not disturb settings?

    My Conspiracy theory is that macbooks DND settings must have been software locked by apple by unknown purposes.:cool: Maybe they are using some of our laptops for something at night?o_O
     

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