Previous 1 17 18 19 20 21 Next 3,346 Replies Latest reply: Aug 27, 2014 4:12 PM by TammyVB Go to original post Branched to a new discussion.
  • Brollen Level 1 (0 points)

    I went from Snow Leopard (rock solid performer... sigh) to ML and am experiencing 1/2 the battery life and much slower response and "feel". I have a 2011 MPB 13" SB i5 with 8GB of RAM.


    ML is very nice - I like it more than SL (didn't think that would be possible) - but it does have a beta feel to it. Some quirks and other issues seen as well. But all the apps I care about run nicely.

  • keslergo Level 1 (0 points)

    I just checked it says my battery's cycle count is only 98.


    Battery Information:


      Model Information:

      Serial Number:

      Manufacturer:          DP

      Device Name:

      Pack Lot Code:          0

      PCB Lot Code:          0

      Firmware Version:          201

      Hardware Revision:          2

      Cell Revision:          158

      Charge Information:

      Charge Remaining (mAh):          2772

      Fully Charged:          No

      Charging:          Yes

      Full Charge Capacity (mAh):          2801

      Health Information:

      Cycle Count:          98

      Condition:          Service Battery

      Battery Installed:          Yes

      Amperage (mA):          300

      Voltage (mV):          12083

  • keslergo Level 1 (0 points)

    Same here, I noticed the battery performance dropping significantly but since I'm normally just at work or at home, it never bothered me until I saw "Service Battery" on the menu this morning. Problem with this, I can't buy a new battery while the service center checks on my current battery like the older MBPs.

  • PeterBacani Level 1 (0 points)

    Just chiming in too


    Mid 2009 MBP, Upgraded to ML last week

    Not only did my battery go down from an average of 6hrs down to 2, its now reporting a service battery:


    Model Information:

      Serial Number:        

      Manufacturer:          SMP

      Device Name:          bq20z451

      Pack Lot Code:          0

      PCB Lot Code:          0

      Firmware Version:          3

      Hardware Revision:          2

      Cell Revision:          100

      Charge Information:

      Charge Remaining (mAh):          2392

      Fully Charged:          No

      Charging:          No

      Full Charge Capacity (mAh):          3846

      Health Information:

      Cycle Count:          301

      Condition:          Service Battery

      Battery Installed:          Yes

      Amperage (mA):          -854

      Voltage (mV):          11293

  • keslergo Level 1 (0 points)

    Welcome to the club! I forgot to get Apple Care for this one as I was too excited for the new one with Retina Display...problem is I want a 13 inch instead of my problem is if I should wait for the new one to come out or just get a new one now.

  • David A. Gatwood Level 3 (580 points)

    Interesting.  Both you and PeterBacani are showing cycle counts that are way below the expected lifespan of those units (1000 cycles in both cases, according to, and both of you are showing battery capacity that's very nearly a factor of two lower than what I'd expect for those units.


    It is possible that both your batteries are defective and just happened to fail prematurely, but it is also possible that there's a bug either in the OS or in the SMC firmware such that for some reason, the actual battery capacity is being grossly misreported.


    Things to do:


    1.  Try an SMC reset.  If that cures the problem, even temporarily, then it seems likely that the new OS is somehow tickling an SMC bug.

    2.  Try installing Lion on an external hard drive, do an SMC reset, then boot from the Lion drive and see if the problem persists.  If the problem goes away, it's an OS bug.


    If the problem persists even after an SMC reset while booted from a Lion drive, then you both got really unlucky, and your batteries just happened to fail prematurely at about the same time as you installed the new OS, in which case you would be wise to not play the lottery or go skydiving. 

  • flatley Level 1 (0 points)

    2 cents of hope:


    The battery life on my mid-2011 MBP dropped 30% from a comfortable 6 hours to a miserable 2 hours after I installed ML the day it launched. The first thing I did was to check Activity Monitor, which showed nothing. The fan was making heckalotta noise too.


    Fast forward to today, I checked Activity Monitor again, and I saw a program called vshieldupdate being run by root taking up some 99% of CPU. I force-quit it, and unplugged the power adapter. It was at 100% when I unplugged it - and it's been exactly 25 minutes since that happened - and my battery shows 94% full - 7:06 remaining (I am skeptical about this though). I am going to leave it on and let it drain to give me an idea about its life. The fan noise has stopped too.


    I understand vshieldupdate ships with VMware tools. I am puzzled because I never installed any VMWare software. Does it ship with Mountain Lion?


    Edit: After a bit of googling, I realized vshieldupdate ships with McAfee. Has it been causing battery issues for anyone else?

  • iamkangyoon Level 1 (0 points)

    I'm running the MBA (Mid-2011) model (more expensive 11" model) and I used to get a good 5~4.5 hour battery life off my MBA while using Lion... did the upgrade and immediately my battery life dropped in half.. I'm lucky to get 2.5 hours now even with wifi off and screen to minimal brightness. I really hope Apple fixes this soon.

  • keslergo Level 1 (0 points)

    Did the reset...didn't do anything. Too busy to do external HD installation because its my birthday...What a nice present from Apple


    Not for anything but I changed Energy Saver Preferences before I got the Service Battery warning...

  • David A. Gatwood Level 3 (580 points)

    Try booting Lion and make sure that the problem is, in fact, hardware.  If it is, I would contact Apple even if the device is out of warranty.  Call the 1-800 number, press 0 repeatedly until you get an operator, and ask to be transferred to Apple customer relations.  Explain the situation (a battery that lasted only 9% of its design lifespan), and ask them to make a one-time warranty exception.  But don't do that until you've tried an SMC reset followed immediately by booting into Lion (without booting into Mountain Lion first—use the option key at startup to choose the device to boot from).

  • alwaysforever Level 1 (75 points)

    I guess this is something I should be concerned about, too.


    I have a 2011 MBP, and I use wall power almost all of the time. Still, my battery doesn't seem to want to charge above 98%. I figured that was how it is supposed to be, so I didn't worry about it.


    Then today, I went to set it up and the indicator light was green on my charger, so I turned it on. The battery was at 97%. This never used to happen with Snow Leopard. If my indicator was green, I was at 100%.


    I fear this is a sign of something, and I'm not sure what. After reading these reports though, I have to wonder if Mountain Lion is a battery killer. Not because it drains the battery faster, but I'm wondering if something in the OS can actually wreck the battery. Can it? I mean... is that even possible?


    Am I seeing early signs of my battery being zapped?

  • RonenB Level 1 (0 points)

    Same problem here, MBA mid 2011, i5. Fan is noisy, battery down to 2h, the charging area is extremly hot, cannot touch it although CPU temprature is reported as 53 centigrades.

  • Ernielm Level 1 (0 points)

    I thought I was losing it. Now I see I'm not the only one with this issue. This is ridiculous!

  • Trekstar54 Level 1 (10 points)

    I've also noticed this. I'm on a MacBook Pro 15-inch Early 2011. Running (obviously) 10.8. Right now, it doesn't even alert me of a low battery anymore.

  • enkrypt3r Level 1 (0 points)


    Just began a test. Disconnected the power adapter, and the gauge dropped from 99% to 80% in less than 45 minutes.

    Essentially making making my mid-2009 17" Macbook Pro unusable for anything more than an estimated 2.5 hours... Not pleased.

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