Installing New Battery Caused Crazy CPU Consumption (Macbook Pro, Early 2011)

Discussion in 'Mac Basics and Help' started by ihinman, Oct 9, 2014.

  1. ihinman macrumors newbie

    Joined:
    Oct 9, 2014
    #1
    So my original battery in my Macbook Pro (MC723LL/A) passed 1000 cycles a few weeks ago, and the battery life has been getting horrible. I ordered a new battery off Amazon (A1386, same as factory). When I installed the battery and booted up, however, the computer was running REALLY slow. I opened Activity Monitor, and kernel_task was using between 200 and 300% CPU, and there were several Google Chrome Helper tasks using huge amounts of memory/CPU as well.

    At first I didn't realize what had happened, and spent quite awhile trying to debug and sort out the problem. Finally out of frustration I switched the old battery back in, and voila, everything was back to normal.

    What could possibly be causing this??

    Before you suggest it, yes I tried PRAM/SMC resets, of course I rebooted the computer numerous times, repaired permissions, ran a full sweep with OnyX, deleted and fresh installed Chrome, etc, etc.
     
  2. Tumbleweed666, Oct 10, 2014
    Last edited: Oct 11, 2014

    Tumbleweed666 macrumors 68000

    Joined:
    Mar 20, 2009
    Location:
    Near London, UK.
    #2
    I wonder if there is a fault with the battery and it has very low voltage ?

    Have you swapped it back and seen if this repeated or was one-off?
     

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