rMBP suspends on high power draw; dead battery

Discussion in 'MacBook Pro' started by syan48306, Jul 30, 2014.

  1. syan48306, Jul 30, 2014
    Last edited: Aug 1, 2014

    syan48306 macrumors 6502a

    syan48306

    Joined:
    Apr 15, 2010
    #1
    I encountered something interesting today.

    When I maxed out the CPU with 8 threads of "yes > /dev/null &" while on battery, the macbook pro went into suspend mode after a couple minutes.

    When I tried to turn it on, I got this symbol.

    [​IMG]


    It refuses to boot up on battery. When I plug it in, the laptop starts up just fine with 30% battery...
    I was able to reproduce this a couple times.

    :confused:

    EDIT: Looks like my battery just gave out on me.
     
  2. maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #2
    Does it do this when you use the computer normally?

    I'd say you drained the battery since you caused the CPUS go at 100% (or near) and the computer shut down.

    My advice is not to run yes > /dev/nul while on the battery.
     
  3. syan48306 thread starter macrumors 6502a

    syan48306

    Joined:
    Apr 15, 2010
    #3
    It did the same thing when I was on battery at 25% when watching a flash video. There was a little bit of heat generated by the computer as the fans spun up but it was nowhere near a cpu burn.

    It's very annoying since I need to then go find the power plug because it refuses to start up once it goes into that mode.

    It's as if the 0% needs to be recalibrated but it clearly has power since it only acts up under load. It like it doesn't have the current or something :/
     
  4. maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #4
    Take it into apple and see what they say. If you're battery is shutting the machine down at 25% that's not right.

    I'd also look to maybe calibrate it, but given the deep drains you've done, I think the calibration isn't needed.
     
  5. syan48306 thread starter macrumors 6502a

    syan48306

    Joined:
    Apr 15, 2010
    #5
    I'm well out of my warranty.

    Well that's it then. I just got the error: [​IMG]
    [​IMG]
    [​IMG]
     

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