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  • 2,805. Re: Battery life dropped considerably on Mountain Lion.
    wullewuu Level 1 Level 1 (0 points)

    I made every test they wanted and I said, that I will not accept any "wait for an update" trash, because it is my working computer and I NEED it. So we made different tests with Clean Install Lion and ML, Battery Time and so on.. and they do not know what is the problem. My battery lost 12% Health in 1 week because of the 20 loading cycles.. so I will become a new one and the only solution is: Use Lion.

  • 2,806. Re: Battery life dropped considerably on Mountain Lion.
    Bill Jacobs2 Level 1 Level 1 (20 points)

    A user over thisaways started having problems when he encrypted with Filevault 2.

     

    An SMU reset fixed it, but the battery life would plummet (and the laptop would get very warm) when he started using his wireless networking.

     

    If the drive was not encrypted or if he turned off Airport and used cabled ethernet isntead, the battery life stayed okay.

     

     

    Wireless driver causing problems with power management????

     

     

    It'd be interesting if others can see if disabling wireless or decrypting a FileVault 2 encrypted drive makes their problem go away.

  • 2,807. Re: Battery life dropped considerably on Mountain Lion.
    richsadams Level 1 Level 1 (70 points)

    Bill Jacobs2 wrote:

     

    A user over thisaways started having problems when he encrypted with Filevault 2.

     

    An SMU reset fixed it, but the battery life would plummet (and the laptop would get very warm) when he started using his wireless networking.

     

    If the drive was not encrypted or if he turned off Airport and used cabled ethernet isntead, the battery life stayed okay.

     

     

    Wireless driver causing problems with power management????

     

     

    It'd be interesting if others can see if disabling wireless or decrypting a FileVault 2 encrypted drive makes their problem go away.

     

    Turning off WiFi will certainly help to increase battery life, but it's not the root problem in this circumstance as folks have tried to enabled and disabled WiFi and a half-dozen other services without really addressing the problem. 

     

    AFAIK no one's mentioned File Vault.  Based on various posts I'd wager most folks that are still experiencing the issue aren't using it.

     

    Encrypting and decrypting files is CPU intensive and subsequently a high drain on any battery so it's not unusual for things to heat up when File Vault is used, particularly if someone encrypted their entire boot drive.

     

    Poor SMC power management is still the most likely culprit for those left suffering reduced battery life.

  • 2,808. Re: Battery life dropped considerably on Mountain Lion.
    Bill Jacobs2 Level 1 Level 1 (20 points)

    The Macbook Pro would heat up when using the wireless on an encrypted drve.

     

    If the drive was NOT encrypted, normal battery.

    If the drive were encrypted but NOT using wireless, normal battery.

    Both?  Warm macbook and short battery life.

     

    Poor SMC power management.  Unquestionably!  I'm wondering if the FileVault2 and wireless adapter may be reliably triggering a flaw that hoses SMC where other people's macs are triggering it by other methods.

     

    How many people can reset their SMC, turn off their airport and find that they are cured?

    Filevault2 encryption, yes, is likely not in common use, but is the wireless driver contributing?

    We get laptops to NOT be tethered to teh wall, so wireless may be in use on ALL of them.  How many connect with cable to troubleshoot?

  • 2,809. Re: Battery life dropped considerably on Mountain Lion.
    KKphys Level 1 Level 1 (0 points)

    This was really weird, just bought MacBook Pro 15'' with Retina display 2 days ago and the battery life sucked. I had something between 2:30 and 3 hours of battery time.

    I have reset SMC and NVRAM and it looked like it didn't work until I started writing this post. While writing computer charged the battery to 100% and now it shows 10:36 hours of battery.

    It would be nice to know what helped and I'm still considering the possibilty that it will be only temporary.

  • 2,810. Re: Battery life dropped considerably on Mountain Lion.
    malbayrak Level 1 Level 1 (0 points)

    System: Macbook Pro Middle 2009 15 inch

    Battery under Lion 75% about 830 Cycles and still working with a capacity of 4 -5 hours

     

    Upgraded to ML 2 days ago. I lost about 50 % of my battery. So I did a fresh install, still the same.

    This in my opinion is unacceptable. I'm going to restore to Lion and hopefully my battery will revert back to the way it was.

    Apple please do something about this and don't tell me to bring my machine to a Servicecenter and have the battery changed..

  • 2,811. Re: Battery life dropped considerably on Mountain Lion.
    Jimmy Kats Level 1 Level 1 (10 points)

    Have you noticed any improvement? I have a new 2012 non retina macbook pro. I installed mountain lion once it came out, saw the battery drain and heat issues and immediatly when to lion again. do you 10.8.2?

  • 2,812. Re: Battery life dropped considerably on Mountain Lion.
    KKphys Level 1 Level 1 (0 points)

    Yes. I have 10.8.2.

    I've been testing for a little more than a day after I have reset SMC and NVRAM (and also I have disabled Find My Mac in iCloud and one more application which syncs as well). As I've said before I could see the percentage drop instantly and with full battery the estimate was always under 3 hours. Now I see reasonable times i.e. 4-7 hours depending what kind of work I do.

    Actually I have a 2012 non retina macbook pro as well and I have upgraded to ML 10.8.2 and haven't had any issues yet (early times, running only for a day).

  • 2,813. Re: Battery life dropped considerably on Mountain Lion.
    Nickholl Level 1 Level 1 (0 points)

    Well we'll well! Apple have released a new software update for notebooks - and seems to have made an instant difference to my estimated battery time! Obviously I've yet to test things properly, but everyone should go and download this now!

     

    Good luck :)

  • 2,814. Re: Battery life dropped considerably on Mountain Lion.
    brianx87 Level 1 Level 1 (10 points)

    No! No updates for the Macbook Air Late 2010 so what exactly are you on about Nickholl???

  • 2,815. Re: Battery life dropped considerably on Mountain Lion.
    Nickholl Level 1 Level 1 (0 points)

    so sorry - its only for macs mid 2012    http://support.apple.com/kb/DL1609

     

    sorry to get your hopes up

  • 2,816. Re: Battery life dropped considerably on Mountain Lion.
    Nickholl Level 1 Level 1 (0 points)

    as I say - i only had a very quick  look this morning before I left home. It went from being3-4 hours to 6.5hrs which looked promising - I have yet to give it a proper check.  If it DOES have an effect then id be interested to know what they've changed - as theres nothing specific in the details - only mentions USB handling

  • 2,817. Re: Battery life dropped considerably on Mountain Lion.
    MSKG11 Level 1 Level 1 (0 points)

    Hi Nickholl - looks like that's an update for OSX 10.7.4. Not for Mountain Lion.

  • 2,818. Re: Battery life dropped considerably on Mountain Lion.
    Nickholl Level 1 Level 1 (0 points)

    Mmmm all I can assume is that it applies for multiple versions and that is the lowest. What I do know is that I run the latest version of mountain lion on my retina MacBook and I was prompted to install this via software update.

  • 2,819. Re: Battery life dropped considerably on Mountain Lion.
    Nickholl Level 1 Level 1 (0 points)

    looks like its all achademic after all no difference reported. After that initial spike in estimated battery life its now back down to 3.5