TheRosta

Q: MacBook Pro 2011 Battery Re-Charging Issue

Hey everyone, I discovered a problem on my 2011 MBP 17" which I was told that "it's perfectly normal' and I want to see if you guys can reproduce it on your new 2011 models as well (please indicate your screen size).

In summary, I noticed that depending on CPU usage, the battery reacharge time will greatly fluctuate to the point where the laptop just stops charging the battery. I noticed the giant fluctuations in time when I booted one of my VMs which used up like 15-20% overall cpu usage. I was at 5% battery life and the computer was plugged in recharging and the battery indicator all of the sudden went from somewhere around 2.5 hours recharge time to 10 hours to 15 then 20 hours. Then at some point the magsafe light went green and the battery indicator showed 'Not Charging'.

I thought that I may have a bad MagSafe so I tried the one from my 2009 MBP (both are the 85W version) and bam same problem. I figured that this may be due to a design flaw where the power unit cannot supply enough tower to feed a CPU that's being somewhat taxed (i'm talking about 25-50% usuage) and recharge a battery.

Here is a simple way to try to reproduce the problem:

1. Let you battery drain to about 80% or less.

2. Close all open programs.

3. Change your battery indicator icon in the menu bar to display the info as 'Time'.

4. Plug in your MagSafe and let the recharge time in the battery indicator calculate and stabilize (give it about 2 mins to get a stable time value).

5. Open up safari and go to Hulu and play any TV show to drive up your cpu usage.

6. Then open Terminal and type the command 'yes' (without the quotes) and hit enter. The 'yes' command basically causes an infinite loop of the letter 'y' to be display in the terminal window which also taxes your CPU in addition to the video playing in Hulu.

7. Now watch the battery indicator's recharge time value and you should notice that it'll start going up significantly in time and at some point it'll say 'Recalculating' and eventually it'll give up and say 'Not Charging'. I have a 2009 MBP 17" C2D 2.66GHz, and although the recharge time goes up by 20-30% in the exact same test, it at least still charges the battery.

I was able to reproduce this at the apple store on a 17" 2011 model as well but I'm curious if this also happens on the 15 and 13 inch models. I was told by the engineering team on the phone that this is 'perfectly normal'. I guess it falls in the category of malfunctions as designed...

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2011 MBP 17" anti-glare, Mac OS X (10.6.6)

Posted on Mar 18, 2011 4:34 PM

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Q: MacBook Pro 2011 Battery Re-Charging Issue

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  • by jerrythea,

    jerrythea jerrythea Jan 10, 2012 2:56 PM in response to jerrythea
    Level 1 (4 points)
    Jan 10, 2012 2:56 PM in response to jerrythea

    I added Facetime to the mix, no issues.

     

    Now, the reason I stumbled across this forum was that earlier today, not doing anything particularly cumbersome, my battery change got down to 97% and the magsafe light went orange.

     

    So, perhaps there are times when the battery is used to supplement power.

     

    BTW, flash causes problems for lots of browsers and computers. It's awful software that is pure spaghetti code. HTML5 is the solution.

  • by jerrythea,

    jerrythea jerrythea Jan 10, 2012 2:57 PM in response to 256fx
    Level 1 (4 points)
    Jan 10, 2012 2:57 PM in response to 256fx

    15", hires anti glare (1680x1050).

    Also, an external DVI-D monitor running at 1920x1200

  • by 256fx,

    256fx 256fx Jan 10, 2012 2:59 PM in response to Varoudis
    Level 1 (0 points)
    Jan 10, 2012 2:59 PM in response to Varoudis

    900 pounds, Thats a REALLY heavy display.

    Varoudis wrote:

     

    I think the problem is even bigger when Im using the Apple Thunderbult display... which is stupid for a 900 pounds display...

     

    Anyone tested Charger VS TB Display?

  • by 256fx,

    256fx 256fx Jan 10, 2012 3:00 PM in response to jerrythea
    Level 1 (0 points)
    Jan 10, 2012 3:00 PM in response to jerrythea

    I havn't noticed the issue for a while actually.

     

    I normally got it when running several VMs at a time, The VMs arn't flat out but they are doing stuff.

     

    Maybe it is fixed now.

  • by arpst0rm,

    arpst0rm arpst0rm Jan 10, 2012 3:05 PM in response to jerrythea
    Level 1 (15 points)
    Jan 10, 2012 3:05 PM in response to jerrythea

    I am running macbook pro 10.7.2 2.3 GH i7 with 8 GB of ram. Running external display at 3840 x 1200.

     

    I can make the problem happen without external display.  I have even tried forcing integrated display only with no luck.

     

    The odd thing is is not consistent.  Running apps once its fine, running them a second time and the problem pops up again. 

  • by jerrythea,

    jerrythea jerrythea Jan 10, 2012 3:05 PM in response to 256fx
    Level 1 (4 points)
    Jan 10, 2012 3:05 PM in response to 256fx

    BTW, if this problem didn't exist, given the wattage of the magsafe, the alternative would be for the macbook to turn off under very heavy load. Or, like older Unix systems, start indiscriminately killing processes.

     

    It's pretty amazing that they designed the circuitry to pull in power from the battery even when on AC.

  • by TEVillegas,

    TEVillegas TEVillegas Jan 10, 2012 3:10 PM in response to TheRosta
    Level 1 (4 points)
    Jan 10, 2012 3:10 PM in response to TheRosta

    Whether the discrete GPU option is checked or not I found that chatting with someone on Skype using the iSight HD camera will throw it into not charging relitively quickly.  Not only will it throw it into that status, it will drain the battery as well.  I have to quit the "Video Call." With quitting it, I don't have to cancel the current call (I just have to cut what is being projected through the iSight), then battery will begin to charge.  Only after I quit the video feed on my end.

     

    I've also had the problem using Parallels Desktop 7, although it is much more difficult to replicate.

     

    The Skype Video Call test is a surefire way for me to replicate this issue.

     

    I am running the same firmware as you jerrythea:

     

    Model Identifier:            MacBookPro8,2

    Processor Name:            Intel Core i7

    Processor Speed:           2.5 GHz

    Boot ROM Version:        MBP81.0047.B24

    SMC Version (system):   1.69f3

    Software:                      10.7.2 (11C74)

  • by 256fx,

    256fx 256fx Jan 10, 2012 3:12 PM in response to jerrythea
    Level 1 (0 points)
    Jan 10, 2012 3:12 PM in response to jerrythea

    jerrythea wrote:

     

    BTW, if this problem didn't exist, given the wattage of the magsafe, the alternative would be for the macbook to turn off under very heavy load. Or, like older Unix systems, start indiscriminately killing processes.

     

    It's pretty amazing that they designed the circuitry to pull in power from the battery even when on AC.

    Even more amazing that it still happens in the late 2011 models.

     

    Has anyone reported this as a bug to apple using the online form?

    I've reported a few issues or things that annoy me and some have been changed or fixed, What luck :-)

     

    just because this is an apple form doesn't mean apple are reading it.

     

    I don't think i've recorded a bug because my laptop has never drained completly and powered off.

  • by jerrythea,

    jerrythea jerrythea Jan 10, 2012 3:21 PM in response to 256fx
    Level 1 (4 points)
    Jan 10, 2012 3:21 PM in response to 256fx

    I had facetime running during my test, and it starts a live video feed using the Facetime HD camera.

     

    Apple is more and more moving towards a model whereby issues that occur using non-Apple software and hardware take much less precendence. So, Skype, Firefox, etc, they can say that they don't stress test their machines with that software, but with Safari and Facetime.

     

    I know, it's a closed system, but that is what has made Apple so successful. When they control the ecosystem, they can make it 'just work'.

     

    Again, the  alternative would be to turn the macbook off. That seems a lot more extreme then using up battery or indiscrimantely killing processes.

     

    If your software is so stressing the machine, that the provided power is not enough to run it, what would you have it do?

     

    I was quite alarmed when this happened to me earlier today, but based on this recent discussion, I feel that Apple is doing just the right thing given their other alternatives:

     

    1. Provide higher wattage magsafe - This gives everyone more power and heat, despite the fact that many users are not like 'us'.
    2. Kill processes that are using too much power (i.e. CPU/GPU)
    3. Run out of power and die.
  • by 256fx,

    256fx 256fx Jan 10, 2012 3:28 PM in response to jerrythea
    Level 1 (0 points)
    Jan 10, 2012 3:28 PM in response to jerrythea

    jerrythea wrote:

     

    Apple is more and more moving towards a model whereby issues that occur using non-Apple software and hardware take much less precendence. So, Skype, Firefox, etc, they can say that they don't stress test their machines with that software, but with Safari and Facetime.

     

    I know, it's a closed system, but that is what has made Apple so successful. When they control the ecosystem, they can make it 'just work'.

     

    Again, the  alternative would be to turn the macbook off. That seems a lot more extreme then using up battery or indiscrimantely killing processes.

     

    If your software is so stressing the machine, that the provided power is not enough to run it, what would you have it do?

     

     

    Thats just so wrong. These machines should be able to run at 100% for as long as they need to. There is no "duty cycle" with computers, there never has been and there never should be.

     

    If it needed more power to run they should have hardened the F up and given it more power, these machines are high end workhorse laptops aimed specificilly at the demanding professional.

     

    They are not lollypop MSN or facebook clients. (unless your a teenager and your parents spoil you with things you clearly don't match what you use it for)

  • by TEVillegas,

    TEVillegas TEVillegas Jan 10, 2012 3:33 PM in response to 256fx
    Level 1 (4 points)
    Jan 10, 2012 3:33 PM in response to 256fx

    Agreed, I just want to bring this issue to light and hopefully if enough people are having it, Apple will act.  I totally understand Apple being "a closed system," but that doesn't mean the MBP can act like this under normal use.  Besides Skype is used by many corporations, including Apple.

  • by jerrythea,

    jerrythea jerrythea Jan 10, 2012 3:35 PM in response to 256fx
    Level 1 (4 points)
    Jan 10, 2012 3:35 PM in response to 256fx

    It's all about trade-offs and making as much of your customer base as happy as you can, while also keeping costs down.

     

    If they designed the machines to run at 100% usage while on AC, then all their customers would have to live with the larger power brick and heat.

     

    They still have a desktop, Mac Pro. So, as long as they don't kill that (which they might) there is always a solution for those who need 100% power and 100% uptime at the same time. This is designed for a permanent setting, like a studio, etc.

     

    I am glad I got a laptop. I have this discussion with my son all the time. Laptops can only have 1 hard drive (although I plan on adding a second). The CPU's get much hotter. The ventilation isn't as good. The fan is much noisier. They are not as customizable. I could go on and on about the compromises one makes with a laptop.

     

    But, they are portable and can run on battery when I travel. That's the key.

  • by 256fx,

    256fx 256fx Jan 10, 2012 3:43 PM in response to jerrythea
    Level 1 (0 points)
    Jan 10, 2012 3:43 PM in response to jerrythea

    jerrythea wrote:

     

    It's all about trade-offs and making as much of your customer base as happy as you can, while also keeping costs down.

     

    If they designed the machines to run at 100% usage while on AC, then all their customers would have to live with the larger power brick and heat.

     

     

    The 17" macbook already has a bigger power supply than the 13"

    If the users isn't taxing their laptop much then i don't see how they'd get more head by having more capacity, if anything the heat should be less.

     

    Maybe if you had the 17" macbook you'd have more power troubles like the rest of us have had.

     

    I think they just didn't want to change the power supply because i could certainly live with something 1cm or so bigger, it wouldn't take much to give it a few more watts.

  • by jerrythea,

    jerrythea jerrythea Jan 10, 2012 4:08 PM in response to 256fx
    Level 1 (4 points)
    Jan 10, 2012 4:08 PM in response to 256fx

    I've got a 15" MacBook pro.

     

    Is there a difference in the power supply between 15" and 17" ?

  • by 256fx,

    256fx 256fx Jan 10, 2012 4:10 PM in response to jerrythea
    Level 1 (0 points)
    Jan 10, 2012 4:10 PM in response to jerrythea

    jerrythea wrote:

     

    I've got a 15" MacBook pro.

     

    Is there a difference in the power supply between 15" and 17" ?

     

    I'm not sure, I think 15" is also an 85W, it sais it on the side of the power supply.

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