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Battery life dropped considerably on Mountain Lion.

520387 Views 3,396 Replies Latest reply: Oct 28, 2013 5:38 AM by CT RSS Branched to a new discussion.
  • richsadams Level 1 Level 1 (70 points)

    jmorandeau wrote:

     

    Hi Richadams,

     

    I have read this thread for a long while and finally this morning I decided to do a clean install. I have a mid 2012 MBP retina.

    After this clean install, I got 2h30 !!! Disapointed ! But I remembered reading that we have to do a SMC too. I did it.

    And miracle ! I get now between 7h and 8h30. Very happy ! And it remains at this level for a while now.

    I will use now your advise above to get back progressively all the files from Time machine, without doing it automatically.

    Many thanks.

    jm

     

    Excellent news and glad to have helped a little!  My MBA behaved the same way after a fresh install.  Once I reset the SMC, all was right with the world.

     

    Im wondering what an SMC is.

     

    It might help to list your CPU along with battery life.

     

    The 7 hours battery time is given across all models, but the CPU goes from 2.3 to 2.7ghz.

     

    A few years back sony did a similar marketing campaign with battery life, but upon close scrutiny, its a blanket life - the lowest processer will achieve this, but the highest one wont.  Makes sense because a bigger processor is a bigger power consumption.

     

    That said, there are firmware issues for some reason.

     

    Posting CPU and battery life can't hurt, but other info would be needed as well including SMC version, battery model, RAM, GPU, etc. and there are so many possible combinations, only Apple is really capable of sorting things out IMHO.

     

    One of the reasons Apple is (generally) the "gold standard" when it comes to anything they make is that unlike most manufacturers that use off-the-shelf components to build their products, almost everything inside and outside are actually designed by Apple themselves.  The few exceptions are hard drives and sometimes RAM...and even then the components are specifically matched to each other.

     

    That design element applies to batteries and their being matched to systems.  In most cases a system employing components with higher energy demand will have a battery to match.  So in your example a notebook that offers a 2.3GHz CPU as well as a 2.7GHz option will either have a battery that will meet the battery life spec using the faster CPU OR a different battery for the faster CPU build.  Then as mentinoed, there are RAM, GPU and a laundry list of other possible differences.  That's why you'll see some folks saying that their particular notebook gets a little shoter or longer battery life per charge  than someone else's, but both will meet the minimum spec. 

     

    So where another company may use the same battery in several models (or even model years) as a way to save money, you won't see the same with Apple.  In fact they have "upgraded" batteries in some models during mid-life builds.  That's a small piece of the somewhat mythical, but somewhat real "Apple tax".  I for one am more than willing to pay it. 

     

    Among other things, the SMC controls power flow and fan speed.  (More here.)  Based on the majority of evidence posted here and elsewhere (including my own experiences) my WAG for a long time now is that this battery problem is basically an SMC issue.  Most MacBooks had the SMC firmware updated with the release of OS X v10.8 on July 25th and Apple's been tweaking things since then.  It seems most problems have been ironed out, but a few still remain.  (Plus there will always be coincidental issues that are simply manufacturing flaws, etc.)  That's why I continue to be confident that Apple can still iron out the problem for anyone left.  Again, only time will tell.

     

    In any case, glad that things are better.  Follow this advice with respect to maintaining your battery's health and ideally things will continue to go well...

     

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

     

    Enjoy!

  • jmorandeau Level 1 Level 1 (0 points)
    Currently Being Moderated
    Oct 25, 2012 8:26 AM (in response to Jonneale)

    Anyway, this Retina MBP + Mountain Lion = many problems. I have just changed from PC world to Mac, looking for the satbility and the 0 default image, I am a bit surprised and disappointed. Because apart this battery issue, you have the screen burn-in issue (not for all fortunately) and the WiFi issue (I have this one too

    Waiting for 10.8.3 or 4 or 5 ;--))

     

    Jean-Marc.

  • richsadams Level 1 Level 1 (70 points)

    jmorandeau wrote:

     

    Anyway, this Retina MBP + Mountain Lion = many problems. I have just changed from PC world to Mac, looking for the satbility and the 0 default image, I am a bit surprised and disappointed. Because apart this battery issue, you have the screen burn-in issue (not for all fortunately) and the WiFi issue (I have this one too

    Waiting for 10.8.3 or 4 or 5 ;--))

     

    Jean-Marc.

     

    Understood, however my advice has and continues to be...if your MacBook is under warranty (and often even if it's not) and it isn't performing to spec, take it back.  There are millions of MacBooks out there that work fine.  If you have one that doesn't you shouldn't settle or wait for an update.  No mattery what an Apple employee tells you initially, politely keep escalating the issue until your MacBook either works as advertised or is replaced. 

     

    As a one-time PC user (and builder!) I get the "wait, it'll get better" concept; it often does.  However when it comes to customer satisfaction, particularly when a machine is still under warranty, that's not how Apple works and not how they've built their reputation. 

     

    You paid good money for a best-in-class notebook.  It should work as expected.  Nothing is perfect in this world, but Apple does have exceptional customer support.  You paid for that as well.  Again, be polite but firm and they will take care of you. 

  • jmorandeau Level 1 Level 1 (0 points)

    Thanks for the advice. My only difficulty is that I bought this MBP in France and I am living in Africa, in a country where there is no apple store. But going back to France from time to time.

    Concerning WiFi problem, I put it in 5 ghz and that is ok.

     

    Cheers.

    Jean-Marc.

  • richsadams Level 1 Level 1 (70 points)

    Understood. I would go ahead and call Apple Support and open a ticket or contact Apple online.  That way when you do go to the a store in France they'll have a record of it...plus the date of the support ticket will stay valid so warranty work would still be applicable if something happens down the road.

     

    WiFi can be a real pain.  Almost without exception I've found that the issues are with the network itself (setup, settings, etc.) rather than the computer, but anything is possible.  Sometimes all it takes is rebooting everything to do with the network and computer to establish a decent connection, but other times it's more compliacted.

     

    Best of luck and safe travels!

  • wullewuu Calculating status...

    I called the Apple Support, sent them 4 Capture datas to compare Lion with Mountain Lion ans they wanted to call ne in tuesday... Nothing happened. That is the third time ans the third apple worker that i sent all Files and so on and the third time Nobody called me again. Poor!

  • richsadams Level 1 Level 1 (70 points)
    Currently Being Moderated
    Oct 25, 2012 1:40 PM (in response to wullewuu)

    wullewuu wrote:

     

    I called the Apple Support, sent them 4 Capture datas to compare Lion with Mountain Lion ans they wanted to call ne in tuesday... Nothing happened. That is the third time ans the third apple worker that i sent all Files and so on and the third time Nobody called me again. Poor!

     

    Well that stinks.  Did you get a support ticket #?  If so I'd call, tell them what happened and ask to talk to a supervisor.  There's no excuse for that kind of service.  If not I'd open a support ticket...if there's still an issue.

  • ellbow Calculating status...

    hello sir, i have same battery problem, with MBP 13' i7 2012, many ppl tell to clean install and reset SMC to solve the problem. for me is a big deal to clean install with i have a lot data in my MBP,so if i just re install the ML not clean install , that can solve my problem? what your opinion sir, tq

  • asengskie Calculating status...
    Currently Being Moderated
    Oct 25, 2012 11:37 PM (in response to ellbow)

    Hi ellbow, just want to ask how old is your mac and what was the battery health now? thanks

  • ellbow Level 1 Level 1 (0 points)

    my MBP i7 mid 2012, 3+ month old, my battery health now 88%, 2% drain at 1-2 minute. i don't want to clean install coz i have a lot of data, can i re install and how about my data lose or still in HDD. any help sir

  • asengskie Level 1 Level 1 (0 points)
    Currently Being Moderated
    Oct 25, 2012 11:58 PM (in response to ellbow)

    oh no... that's a little worst than mine i have the same like yours but only 4mos old today and my battery health was 93% but i already send it to apple service center to have my battery replace i can get it next week and will see if have some changes... i just do the reset of SMC and PRAM but still it didn't help... so i decided to go to apple service center...

  • richsadams Level 1 Level 1 (70 points)
    Currently Being Moderated
    Oct 26, 2012 6:19 AM (in response to ellbow)

    ellbow wrote:

     

    hello sir, i have same battery problem, with MBP 13' i7 2012, many ppl tell to clean install and reset SMC to solve the problem. for me is a big deal to clean install with i have a lot data in my MBP,so if i just re install the ML not clean install , that can solve my problem? what your opinion sir, tq

     

    ellbow wrote:

     

    my MBP i7 mid 2012, 3+ month old, my battery health now 88%, 2% drain at 1-2 minute. i don't want to clean install coz i have a lot of data, can i re install and how about my data lose or still in HDD. any help sir

     

     

    As I've advised others, since your MacBook is still under warranty take it back to Apple.  If your battery's health has dropped to 88% in 90 days it will certainly fail soon.  I wouldn't waste any time doing any of the recommendations on this thread...something is clearly wrong with your machine.

     

    If you don't have an Apple store nearby, contact Apple Support and open a ticket today.

     

    BTW, I trust that you're backing up your hard drive via Time Machine or some other method on a regular basis correct?  You will need it if they replace your MacBook.

     

    Best of luck!

  • Nickholl Calculating status...

    ooookdoke...

     

    so, as a last attempt before going back to Apple and politely demanding they fix my machine, I did a clean install of mountain Lion (+ applied update and did an SMD reset).

     

    The very initial signs were good - my battery started at 5.5hrs and then went up to 7hrs. The estimate then jumped around quite wildlyand then settled back to 6.5.

     

    BUT...  after about 30minutes use the estimate took a very sudden nose dive back down to 3.4hrs (at 83%).

     

    The estimate is certainly doing some crazy things - as I type its just  gone UP from 3.4hrs to 4.3hrs to 5.18hrs in a matter of 3minutes!

     

    Ill keep an eye on things still - but Im fully expecting the machine to settle back down to being 3.5hrs max.

     

    I have an appointment on tuesday so will take the machine in as it is without any other software installed.

     

    Just out of interest - what do people think would be the minimum hours I should expect to get out of my machine before expecting apple to fix it for me?

     

    thanks guys

    N

  • richsadams Level 1 Level 1 (70 points)
    Currently Being Moderated
    Oct 27, 2012 4:13 PM (in response to Nickholl)

    Well...congratulations on the fresh install!  Nice work.  After a fresh install I had the same experience initially...the battery life estimate was pretty unpredictable.  It took a good 3 to 5 charge cycles before things settled in.  Even then another two or three cycles after that before it really began to be quite accurate.

     

    So I'd give it a while.  Charge it up fully, leaving it plugged in for a couple of hours after the MagSafe connector LED turns green and then discharge down to something under 40% before plugging it back in again.  Follow that routine a half-dozen times and you should see some reliability in however it's going to behave.

     

    Also keep in mind that after a fresh install Spotlight will be indexing your entire hard drive for a while (plus more indexing when you reinstall apps, add files, etc.).  Indexing takes a lot of CPU/power.  It will also slow the machine down some.  So again, give it a while to stabilize.

     

    I can't recall which model MacBook you have (2012 MacBook Pro?), but I believe the spec is around 7 hours of WiFi web browsing (check here).  That's light duty, so any heavy lifting (playing videos, etc.) will be less.  Somewhere around 5 to 6+ hours of mixed use seems to be about average...again...give it some time to get there though.  If that turns out not to be the case, then I'd certainly head back to the Apple store.

     

    Congrats again and best of luck!

  • Nickholl Level 1 Level 1 (0 points)

    :-) this is nuts - my estimate has now shot up to 14hrs!! (at 76%) there is something seriously screwy going on here.

     

    There's been no indexing going on during this time as I havent added anything onto the computer to reindex.

     

    mmmm.... Im almost hoping that it goes back down to 3.5hrs - because I think there's something strange going on here and Id rather they investigate.

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