4 Cycles on new MBP and down to 99%?

Discussion in 'MacBook Pro' started by doktordoris, Apr 19, 2010.

  1. doktordoris macrumors 6502a

    doktordoris

    Joined:
    Mar 14, 2009
    #1
    Hullo,

    Iam a bit alarmed, my lovely new, old MBP that I have had for 11 days and has gone through a mere 4 battery cycles has only, according to coconut battery, 99% of it capacity left.

    I do realise that in real terms that one percent is a piffling thing, but I must admit I find it a bit disheartening to have my beloved machine show signs of age so quickly.

    Is this normal?
    (I mean the battery condition, not my reaction to it. I imagine my reaction is normal for first time mac owners who want their 'baby' to be perfect!)

    thanks for your time.

    doris
     
  2. noobinator macrumors 601

    Joined:
    Jun 19, 2009
    Location:
    Los Angeles, CA
  3. doktordoris thread starter macrumors 6502a

    doktordoris

    Joined:
    Mar 14, 2009
  4. Wehrwolf macrumors 6502

    Wehrwolf

    Joined:
    May 21, 2009
    #4
    Yes, it's normal, and your battery capacity will fluctuate on a regular basis, making any 1-5% changes you may see utterly meaningless. My 2009 13" has over 60 cycles on it and the capacity has ranged from 95%-100%.

    If you're concerned there's a long term issue, then use CoconutBattery's saved data feature to capture the date and battery capacity over the course of several weeks or months. What you'll probably find is that the average capacity will stay the same.

    Otherwise, follow Apple's guidelines on maintaining a healthy battery.
     
  5. Wehrwolf macrumors 6502

    Wehrwolf

    Joined:
    May 21, 2009
    #5
    Here's a screen cap of my CoconutBattery data:

    nvm... :p
     
  6. doktordoris thread starter macrumors 6502a

    doktordoris

    Joined:
    Mar 14, 2009
    #6
    Aha, thanks for your help.

    But I drained it down to 90%, then recharged and now it is back up to 100%.

    doris
     
  7. pricej636 macrumors 6502

    Joined:
    Mar 30, 2010
    Location:
    Colorado
    #7
    That number fluctuates all over the place. You have nothing to worry about.
     
  8. MWPULSE macrumors 6502a

    MWPULSE

    Joined:
    Dec 27, 2008
    Location:
    London
    #8
    the support docs say that you should recalibrate the battery regularly.. wind the battery all the way down to zero, so it comes up with the warning battery message, then plug it in, leave it there until its done.. still use the laptop by all means, but leave it charging.. that will remind the battery computer how much juice it actually has :)

    Hope this helps...

    PTP
     
  9. doktordoris thread starter macrumors 6502a

    doktordoris

    Joined:
    Mar 14, 2009
    #9
    I should recalibrate after only owning it for 11 days and using 4 cycles?

    I normally only use my MBP with mains power, apart from on mondays.
    The only reason there are 4 cycles used is that when I first got it I played with it on battery power for a bit to test out the remarkable battery times.

    doris
     
  10. Wehrwolf macrumors 6502

    Wehrwolf

    Joined:
    May 21, 2009
    #10
  11. vong macrumors 6502a

    vong

    Joined:
    Jan 31, 2010
    #11
    going to use this thread, dont wanna create another one.

    anyone have the link where it tells you what a 'cycle' is and all these battery terms
     
  12. baf30 macrumors newbie

    Joined:
    Feb 17, 2010
  13. doktordoris thread starter macrumors 6502a

    doktordoris

    Joined:
    Mar 14, 2009
    #13

    http://www.apple.com/batteries/
     
  14. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #14
    No, that is NOT the procedure the support docs recommend. What you described is not calibrating.
    Calibrating a portable computer battery

    You should calibrate it when you first get it. From then, every 30-60 days, depending on how you use it.
    A cycle is one full discharge/recharge or two 50% discharges/recharges or four 25% discharges/recharges, etc. Basically, it's whatever combination of discharges/recharges that add up to one full cycle.

    Determining Battery Cycle Count
    iStat Pro
     
  15. ttran88 macrumors regular

    Joined:
    Nov 12, 2009
    #15
    the number fluctuates all the time. One day I'll be at 97% and the next I'll be back at 100%. Don't worry about it.
     

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