Battery drain while sleeping.

Discussion in 'MacBook Pro' started by raymanh, Mar 10, 2018.

  1. raymanh macrumors member

    Joined:
    Aug 27, 2017
    #1
    My 2016 MBP nTB has started to loose more battery while sleeping recently, I think.

    After 9 hours, the battery went from 71% to 59%. Is this normal?

    My energy saver settings are as attached. I also had a few programs open; Safari and Word.

    Thanks for the help.
     

    Attached Files:

  2. MacDawg macrumors Core

    MacDawg

    Joined:
    Mar 20, 2004
    Location:
    "Between the Hedges"
    #2
    I would suggest installing Coconut Battery and checking on your battery's health as a first step
     
  3. raymanh thread starter macrumors member

    Joined:
    Aug 27, 2017
    #3
    It's only got 179 cycles so it should be fine.
     
  4. casperes1996 macrumors 68040

    casperes1996

    Joined:
    Jan 26, 2014
    Location:
    Horsens, Denmark
    #4
    Hmmm. I believe it's meant to be able to handle around 30 days of sleep on a full charge (at max capacity)
     
  5. raymanh thread starter macrumors member

    Joined:
    Aug 27, 2017
    #5
    Yes that's the quoted figure. I do remember not long ago that my overnight drain used to be about 1%. Perhaps I should try 'put hard disks to sleep whenever possible'; but the hard disk should be sleeping anyway when the lid is closed right?
     
  6. jerryk macrumors 601

    Joined:
    Nov 3, 2011
    Location:
    SF Bay Area
    #6
    Do you have any USB devices connected that can power themselves from the computer? I had a USB hub and Audio Interface connected to mine and had even faster drain when I just closed the screen.
     
  7. raymanh thread starter macrumors member

    Joined:
    Aug 27, 2017
  8. nejad, May 2, 2018
    Last edited: May 3, 2018

    nejad macrumors newbie

    Joined:
    Oct 13, 2012
    Location:
    UK
    #8
    "Start up from the built-in macOS Recovery system. Or use Option-Command-R or Shift-Option-Command-R to start up from macOS Recovery over the Internet." (quote is from Apple but cmd+R+on/off works for me)
    After selecting the language start the "Disk Utility" app (last item in the menu that appears) and run "First Aid" both on boot disk (appears highlighted) as well as your hard disk (Macintosh HD)
    Note that it'll take a while for the computer to start in system mode.

    Restart the computer once you have done the above.

    You may need to do the process twice to "improve" the improvement!
     
  9. Picapau21 macrumors 6502

    Joined:
    Apr 26, 2015
    #9
    Did anyone try this
    Did anyone try this out or solve the battery drain issue? I've started having issues with battery life as well and not keen on doing a clean install.
     
  10. sixonjack macrumors newbie

    Joined:
    Aug 7, 2011
    #10
    Anyone know why my internal Macintosh HD shows unmounted? Is that correct? Running First Aid on the Macintosh HD is greyed out. I was able to run First Aid on Disk Image OS X Base System.

    I never had a problem with battery drain at all until I did a clean install of High Sierra. Now the battery drains while doing nothing.
     
  11. Painter2002 macrumors 65816

    Painter2002

    Joined:
    May 9, 2017
    Location:
    Austin, TX
    #11
    So I had this issue on my 2017 MBP w/TB, and somewhere on a thread here I read about turning off notifications while the computer is sleeping. They are ok by default, and once I turned them off I went from losing 10-16% a night to 2 or less percent a night I’m sleep mode.
     
  12. casperes1996 macrumors 68040

    casperes1996

    Joined:
    Jan 26, 2014
    Location:
    Horsens, Denmark
    #12

    It is correct that Machintosh HD should be unmounted in Recovery, since the recovery system is what's mounted, not the main system. However, you should be able to run first aid on it.

    Instead, try booting into single user mode (hold cmd+s on boot) and run "fsck -fy"

    If it does not show "The volume appears to be ok" or something similar, run again until it does.

    When it's done, type "exit" to boot the system.
     
  13. Honza1 macrumors 6502

    Joined:
    Nov 30, 2013
    Location:
    US
    #13
    My daughter had similar problem on her Air and I dug out on line instructions how to check what is preventing sleep (https://www.howtogeek.com/302942/how-to-figure-out-whats-preventing-your-mac-from-sleeping/). After some digging it turned out to be sound which was preventing sleep. After some more searching on the computer and what could be using the sound system, I found out I needed to remove Boom 2. It was forcing sound system to run even when Air was closed and that was draining the batteries. Since then, no battery loss over night observed.
     
  14. casperes1996 macrumors 68040

    casperes1996

    Joined:
    Jan 26, 2014
    Location:
    Horsens, Denmark
    #14

    And removing Boom also gives you more accurate, less distorted audio! Double bonus!
     

Share This Page

13 March 10, 2018