Safe to calibrate by draining battery for MBP 2011?

Discussion in 'MacBook Pro' started by egosumcarlo, May 31, 2011.

  1. egosumcarlo macrumors newbie

    Jan 3, 2011
    Good day. I'm using the early 2011 model of the Macbook Pro 15". I used to remember from using an older model that it is recommended to every now and then drain the battery completely until the MBP goes to sleep. So I followed the procedure outlined in I used the MBP until it got to 0% and then after a few minutes, the display turned off. The "sleep" light only glowed once and then faded and never came back on or pulsated. Therefore, I could not tell if the procedure resulted in the MBP going to sleep or resulted in an unsafe, forced shutdown. I waited for a few seconds and then pressed the Power button. That brought up a gray version of the desktop with a counter at the bottom and when the counter was done, I was back at the desktop. There was not the usual Apple Logo that displays when the MBP is booted up.

    Can anyone confirm if what happened was a sleep or a forced shutdown?Is this procedure safe to perform?

    I did notice in, that the above calibration step is recommended for occasional execution on all MBP models minus a couple of ones from mid-2010 and mid-2009.
  2. GGJstudios macrumors Westmere


    May 16, 2008
    Yes, it's safe to let your MBP sleep or power off during calibration. It won't harm it at all. This should answer most, if not all, of your battery questions:

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