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Battery life dropped considerably on Mountain Lion.

520868 Views 3,396 Replies Latest reply: Oct 28, 2013 5:38 AM by CT RSS Branched to a new discussion.
  • gianluca c Calculating status...

    hello everybody,

    as said my mbp recovered by himself. now it's pretty good.

    yesterday i went to the geniius bar and the guy told me that the 10.8.2 increased the battery of his old mbp at least of 30%. so he said to me to wait and try. it would be release at the same time or right after ios 6.

    i repeat that i don't know how everything recovered, but i passed from 3.55 h at 100% to, as you can see, to up than 8h at 86%. as you can see..

    it's still unbelievable for me too..

     

    Schermata 09-2456187 alle 17.39.37.png

  • giuliospinozzi Calculating status...

    Hi gianluca c, I'm Italian as you. I don't konw a thing...you have ML 10.8.2 or .1?? Your results are which ones?

     

    thanks

  • salty777 Level 3 Level 3 (540 points)

    Glad to hear yours recovered by itself. How did it do that?

     

    Mines still working for about 3 to 3.5 hours (Macbook Air 13" i7) before it gives up the ghost.... way off the 7 hours advertised.

     

    All seems to have gone quiet. I'm waiting for the next update; if it doesn't work I'm taking mine back to Apple on the basis that it doesn't work as advertised.

  • Beisarius Level 1 Level 1 (0 points)
    Currently Being Moderated
    Sep 16, 2012 10:04 PM (in response to salty777)

    Am inclining more and more towards GPU. I tested to day using web videos. What i noted was that once I played a video, the consumption went up, time dropped 30-40 % and remained as such well after I stopped the video test, as long as the initiating app was still on. Also, Chrome froze and i had a to do a force quit. Quitting would indeed slow down consumption on the 2012 MBA. Then its back to nearly normal.

     

    So what this means is that once the GPU is fired up it does not necessarily shut down after the initial demand has ceased. Again, I cannot explain why some units have them and others do not. Possibly many people do not watch videos on a macbook? Am not sure.

  • Krajsnick Level 1 Level 1 (0 points)

    My MBP from late 2011 had incredible battery life before, I could have it in sleep for weeks. Since I installed Mountain Lion it drains very fast now while sleeping, so definately some other stuff happening now under the hood while in sleep.

  • tivoboy Level 1 Level 1 (10 points)

    Does anyone know how BIG the rMBP battery is?  Using the battery logger app, to see how long it last, it reports design capapcity of 8460 with current capacity of 8564, but after sitting charging all night currenty charge of only 8142?

  • njerisaidhi Calculating status...

    had the battery replaced after i was getting about 3.5-4hrs of battery life.  This was about two weeks ago, since then, the battery health has gone down from 100% to 90% (with 14 loadcycles), and then shot back up to 95%, and seems to oscillate between those two numbers.  My battery only lasts 2.5hrs now, which utterly *****.  I set up yet another genius bar appt.  Hopefully i'll just get a logicboard replacement this time, since that seems to be the only thing that fixes the problem, b/c it obviously isn't the battery that's having problem, and there's no possible way they can spin this so that the battery is to blame.

  • jordanreese Calculating status...

    Another brand new MacBook pro retina here with stated 7 hour web surf battery life and only getting 3:30 max. Fresh install of mountain lion. Going to report it to apple. 

  • Sly Raskal Calculating status...

    I hope that the 10.8.2 update is released soon and that it fixes the battery life issue.  I think it may have increased the degradation rate of my previous MBP battery so I had to resort to buying a brand new battery and the new battery can only power the computer for a little over 2 hours even with the screen at the lowest brightness level.  My previous battery, when new, was able to power this same computer for close to 4 1/2 hours.  I have no doubt that ML really screwed things up.

  • Beisarius Level 1 Level 1 (0 points)
    Currently Being Moderated
    Sep 17, 2012 7:09 PM (in response to tivoboy)

    Hey tivoboy,

     

    So at 8600 mAh, on simple usage, your rMBP is essentially an oversized MBA. If you think about it, it is using a similar processor, maybe 8 gb ddr3 and a SSD. In addition, it is also using the dGPU as you are not doing graphic intensive stuff. But because you have a retina 15" screen, you will burn more. So instead of my 700-800 mAh, you should be around 1000 mAh. Maybe 1100? Regardless, 8600/1100 is rougly 7+ hrs.

     

    But you are not getting 7+ hours as you are burning way faster. If 3.5 hours then is means 2500-2900 mAh or 29 Ampers. Or, according to most specs, that is GPU consumption territory.

     

    Any of you noticed that when Flash player fires up, you may get a "Enable Hardware acceleration" mini icon? Anyhow, am more and more convinced that draining machines are using their dGPU in accelerated mode (and 4000 is still cool even then and you will not hear fans) OR on MBP, the main GPU fires up. Even in low wattage mode, it is a far higher drain that a 4000... That would explain the fans and heat that some users are reporting. Fans = must cool off hardware. Or only CPU/GPU warm up. Nothing else on that logiboard heats up.

     

    So it looks some machines are gaming on their own. OK, is it possible we missed Apple's next evolution? from iOS to iThink iMachine iRobot?  Maybe a few macbooks developped an artificial intelligence and are now doing things on their own... I think we should study this further, Number One!!!

     

     

     

     

    Chris

  • bartlettpsj Level 1 Level 1 (0 points)

    Sly, have you tried calibrating the battery?

     

    Apple Portables: Calibrating your computer's battery for best performance

     

    Paul

    Sly Raskal wrote:

     

    I hope that the 10.8.2 update is released soon and that it fixes the battery life issue.  I think it may have increased the degradation rate of my previous MBP battery so I had to resort to buying a brand new battery and the new battery can only power the computer for a little over 2 hours even with the screen at the lowest brightness level.  My previous battery, when new, was able to power this same computer for close to 4 1/2 hours.  I have no doubt that ML really screwed things up.

  • chris_gr Calculating status...

    Beisarius,

    I guess there is something wrong with the GPU in ML since when I killed Flash the constant running of fan and the extreme heat of my computer ended.

    As I have explained in the past, I switched from ML back to Snow Leopard with a clean install and I so no difference, i.e I used to have 7 hrs before upgrading to ML one month ago and now back in SL with the same programms runnin(no flash+ java) I get 4.30 max!  ML may have killed by battery a little bit (i switched to SL after 2 days with ML) and I strongly believe the problem is the firmware update.

    Btw, I went to the apple service in greece (no apple store in here) and they denied their is a problem with the battery in general.

    I lost my faith to Apple, and I just wait for 10.8.2.

  • Sly Raskal Level 1 Level 1 (10 points)

    Hi bartlettpsj,

     

    No, I have not calibrated the battery.  I didn't know you had to calibrate brand new batteries.  I just purchased the battery this past saturday!  I'll read the artcile though, thanks for the link.

  • bartlettpsj Level 1 Level 1 (0 points)

    I'd give it a go.  This is what Apple Support told me when I called up.  I am not sure, but I think it made a difference.  Even though I had a Macbook Air 13" 2012, they said I needed to calibrate.  It seems after some time the battery life came back.  Maybe not straight after I calibrated, but seemed to be better a week or so later!!


    Sly Raskal wrote:

     

    Hi bartlettpsj,

     

    No, I have not calibrated the battery.  I didn't know you had to calibrate brand new batteries.  I just purchased the battery this past saturday!  I'll read the artcile though, thanks for the link.

  • Anddeh Level 1 Level 1 (0 points)

    ML 10.8.2 beta has been tested and confirmed to increase battery life by a decent amount. That said, it still is possible to not do a little, nothing at all, or worse than 10.8.1. We can only wait and see until it is publically released.

     

    This issue seems to replicate the amount of battery issues that occured when iOS 5 came out, specifically the iPhone 4S.

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