C2D MBP ... Does the battery need Calibrating ??

Discussion in 'MacBook Pro' started by Bongolo, Nov 27, 2006.

  1. Bongolo macrumors regular

    Joined:
    Aug 18, 2006
    #1
    Hi there,

    I have seen no mention of battery calibration in my new MBP C2D manual.

    Does the battery actually need calibrating? :confused:

    Many thanks.

    /Bongolo
     
  2. Bongolo thread starter macrumors regular

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    Aug 18, 2006
  3. iW00t macrumors 68040

    iW00t

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    Nov 7, 2006
    Location:
    Defenders of Apple Guild
    #4
    Do it only once a month because each time you do it you waste 1 cycle on your batteries.
     
  4. Bongolo thread starter macrumors regular

    Joined:
    Aug 18, 2006
  5. wiraone macrumors member

    Joined:
    Oct 31, 2006
    #6
    My three weeks old C2D MBP is showing 14 cycles. I do run on battery most of the time and I've only done one recalibration. Is it bad to run down the battery to less than 30% before charging it back up? Should I not let the battery lower than 50% full before charging up? What is the percentage before the MBP consider it as one charge cycle?
     
  6. emotion macrumors 68040

    emotion

    Joined:
    Mar 29, 2004
    Location:
    Manchester, UK
    #7

    I always run Li-Ion batteries right down before recharging. It's a habit from older technology to prevent memory effect (I don't think LiIon has this prob though).

    Batteries in both my laptops are both in good shape so I think it helps (I have 2.5 yr old powerbook rev c 12" with 3.5 hours capacity still).
     
  7. Omegamanstyle macrumors newbie

    Joined:
    Oct 11, 2006
    Location:
    Pennsylvania, USA
    #8
    this is actually the calibration process for PowerBooks. The calibration process for MacBookPros is a little different. Check this out:

    http://docs.info.apple.com/article.html?path=Mac/10.4/en/mh2339.html

    I calibrated my 15" C2D MBP in the first 48 hours when i got it about three weeks ago. I run mostly off the power cord, but my iStatPro says that it's gone through ten cycles. It seems that if I drain the battery below 90%, then recharge, that counts as a cycle.:(

    Oh well.
     
  8. graln1k macrumors member

    Joined:
    Nov 26, 2006
    #9
    Are you allowed to use the computer during step one or do I have to stare at my pretty computer for (how many hours) while it completes the initial charge?
     
  9. ToastMaster macrumors regular

    ToastMaster

    Joined:
    Nov 10, 2005
    Location:
    Tacoma, WA
    #10
    Hmmm... is it bad to have a lot of cycles? My iStat pro widget says that I have 40, but I still get decent battery life.
     
  10. sycho macrumors 6502a

    sycho

    Joined:
    Oct 7, 2006
    #11
    Code:
      Battery Installed:	Yes
      First low level warning:	No
      Full Charge Capacity (mAh):	5646
      Remaining Capacity (mAh):	5446
      Amperage (mA):	0
      Voltage (mV):	12390
      Cycle Count:	23
    I got this guy near the beginning of the month, and I have been running it off of the power apator for several days now. Do that mean I lost 200mA of capacity in the first month alone?:confused:
     
  11. NJuul macrumors 6502

    Joined:
    Mar 15, 2006
    Location:
    Boston
    #12

    No, that means that when your battery is fully charged, you have a capacity of 5646 mAh. At present you have 5446 mAh left of a full charge. It says "charged" when the battery is charged to between 95% and 100%, which means that your battery will only start to re-charge if your battery has less than 95% juice left. It's to prevent it from doing small-scale recharging when the battery is almost fully charged, which preserves battery life. You can try and unplug the mbp, and when the meter says 94%, plug it back in. It will now charge to 100%.
     
  12. sycho macrumors 6502a

    sycho

    Joined:
    Oct 7, 2006
    #13
    ok, thank you.:)
     
  13. imMAColata macrumors member

    Joined:
    Sep 26, 2006
    #14
    Lithium polymer batteries are AFAIK best served by "topping" off rather than completely discharging them. They do not develop memory but degrade over time and from each charge cycle. I dont think you want to deep discharge yoru batteries too often, it is merely helping them degrade faster.
     
  14. emotion macrumors 68040

    emotion

    Joined:
    Mar 29, 2004
    Location:
    Manchester, UK
    #15
    Interesting article I've found:

    http://www.batteryuniversity.com/parttwo-34.htm

    It also suggests removing batteries when plugged in because of heat.
     
  15. aaron.lee2006 macrumors 65816

    aaron.lee2006

    Joined:
    Feb 23, 2006
    Location:
    Ontario, Canada
    #16
    LOL I haven't calibrated since i got my MBP. I am at 71 load cycles and still at 99% battery capacity :D
     
  16. vega07 macrumors 65816

    Joined:
    Aug 7, 2006
    #17
    wow that's pretty good for 71 cycles.

    Coconut battery shows that my battery is 93% after 40 cycles.

    IStat Nano shows 96%.

    which one is correct?
     
  17. zipper1022 macrumors regular

    Joined:
    Oct 13, 2006
    Location:
    Long Island, NY/ Boston, MA
    #18
    what exactly does the cycles mean?

    my mbp says

    4 cycles at 84% abd i havent reay been using it that much...
    ahht his thing is making me scared!!
     
  18. mightymike107 macrumors member

    Joined:
    Aug 26, 2006
    Location:
    Cambridge, MA
    #19
    Wow, you have a full charge capacity of 5600? mine is only 5000. is this the difference of a 17" and the 15" or did i get screwed?

    -mike
     
  19. countach macrumors regular

    Joined:
    Oct 23, 2006
    #20
    As I understand you're better off NOT running it down with LiIon most of the time.
     
  20. mr_matalino macrumors 6502a

    mr_matalino

    Joined:
    Oct 14, 2005
    #21
    You're welcome!
     
  21. mr_matalino macrumors 6502a

    mr_matalino

    Joined:
    Oct 14, 2005
    #22
    Actually if you read it...it does say MacBook Pro (all models) :p
     
  22. UmaThurman macrumors regular

    UmaThurman

    Joined:
    Aug 1, 2006
    Location:
    Georgia
    #23
    My battery at full charage capacity is 5268. Do I need to calibrate my c2d MBP?
     

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