Battery Calibration Question

Discussion in 'MacBook Pro' started by ccashman92, Aug 6, 2010.

  1. ccashman92 macrumors regular

    Joined:
    Aug 1, 2010
    #1
    So, I'm calibrating my battery and I have a few questions. What happens if I restart my computer while trying to kill the battery? Do I need to restart? Also, how often should I do this?
     
  2. kidwithdimples macrumors 6502a

    Joined:
    Jun 17, 2007
    #2
    I don't you understand the concept of calibration. Google it.

    use your MBP without the power source plugged in
    use it until you have 10% remaining in your battery life
    it will ask you to save your work because it's gonna go to sleep
    keep using it until your mbp goes to sleep
    plug your power source in and let it charge until the green light is lid.
     
  3. celticpride678

    Joined:
    Feb 15, 2009
    Location:
    Boston, MA
    #3
    It's OK if you restart you computer, but unless you need to, don't.
     
  4. Blondie :) macrumors 6502a

    Blondie :)

    Joined:
    May 12, 2010
    Location:
    Prescott, AZ
    #4
    make sure that before you calibrate, you leave the computer plugged in fully charged for AT LEAST two hours. Then, like this says, use your computer normally until it goes to sleep. Once it's in sleep, leave the computer completely alone (don't plug back in) for at least 5 hours. Then, feel free to plug your computer back in and begin using it again :) hope this helps :D
     
  5. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #6
  6. ccashman92 thread starter macrumors regular

    Joined:
    Aug 1, 2010
    #7
    I do know how to calibrate. I'm not retarded.

    I want to know how often I should. If I need to do it more then once. My phone has my calibrate the touch screen every 3 months. I don't know why but it does.

    So since I reset the computer I don't need to restart the process.
     
  7. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #8
    If you read the link I posted, you'll know.
     
  8. ccashman92 thread starter macrumors regular

    Joined:
    Aug 1, 2010
    #9
    Your post on the other hand was perfect. Thank you.
     
  9. dvader123 macrumors regular

    Joined:
    Jun 27, 2010
    #10
    I just bought a mpb and didn't keep in fully charged for at least two hours. What is going to happen to my calibration? Can I recalibrate? What should i do?
     
  10. spinnerlys Guest

    spinnerlys

    Joined:
    Sep 7, 2008
    Location:
    forlod bygningen
    #11
    You can calibrate again.


     
  11. dvader123 macrumors regular

    Joined:
    Jun 27, 2010
    #12
    So should I plug the ac adaptor back in and fully charge it right now even though I'm in the middle of draining my battery?

    Thanks.
     
  12. ideal.dreams macrumors 68020

    ideal.dreams

    Joined:
    Jul 19, 2010
    Location:
    OH
    #13
    You're wrong. You're supposed to leave it plugged in and fully charged for 2 hours, unplug it until it puts itself to sleep, leave unplugged for 5 hours, and then charge back up.
     
  13. Tanto macrumors member

    Tanto

    Joined:
    Jun 1, 2010
    Location:
    USA
    #14
    Recal every time you see your battery percentage stop going all the way to 100% when you're got your laptop charging.
     
  14. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #15
    Yes.
    Wrong. Your battery will not always charge to 100%, even after calibration. It may charge to 97% or 99% and stop charging. It is not necessary or recommended to calibrate when this happens, and calibration will not make it charge to 100%.
     
  15. Tanto macrumors member

    Tanto

    Joined:
    Jun 1, 2010
    Location:
    USA
    #16
    Since I'm not an Apple engineer, I can only comment on my personal experiences and the one time it has happened and I re-calibrated it, it went back to 100%.
     
  16. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #17
    Calibration only makes your readings more accurate. It has zero effect on battery health, charge capacity, or charging.
     
  17. Blondie :) macrumors 6502a

    Blondie :)

    Joined:
    May 12, 2010
    Location:
    Prescott, AZ
    #18
    I've always had it go to 100% too, but you never know man, I suppose there could be a time when it doesn't go all the way to 100%
     
  18. zorinlynx macrumors 601

    zorinlynx

    Joined:
    May 31, 2007
    Location:
    Florida, USA
    #19
    There is no need to go out of the way to calibrate your battery. It will eventually calibrate itself as you use the machine normally, drain the battery completely and eventually recharge.

    Calibrating on purpose wastes battery cycles.

    The battery should always charge to 100%. The only exception is if you interrupt charging at over 97% or so; if you do the battery typically won't charge again until it's discharged below 97%.

    A series of shallow discharges is better than deep discharges. Li-Ions don't have memory effect.

    Have fun!
     
  19. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #20
    Wrong. Read the link I posted.
    Wrong. The battery will not "calibrate itself". Calibration is more than simply draining and recharging the battery. Read the link I posted.
    No, it doesn't waste cycles. There is a purpose for calibration. Read the link I posted.
    Wrong. Read the link I posted.
     
  20. Constantine1337 macrumors 6502

    Joined:
    Dec 3, 2009
    #21
    Just get this app to help you calibrate your battery. Its free for 60 days and you can use all its features during that trial period after which it costs like 7$. I have it for some time and I love it!

    Check out the screenshot:
    [​IMG]
     

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