99% Battery Health After 11 Cycles?

Discussion in 'MacBook' started by kellte2, Oct 23, 2008.

  1. kellte2 macrumors regular

    Joined:
    Jul 10, 2005
    #1
    Doesn't that seem a bit quick to anyone? I use my laptop almost primarily on battery power over the course of the day when I'm at school...Any ideas?
     
  2. juanster macrumors 68020

    juanster

    Joined:
    Mar 2, 2007
    Location:
    toronto
    #2
    when was teh last time you calibrate d your battery?
     
  3. Chaos123x macrumors 68000

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    Jul 8, 2008
  4. gonnabuyamac macrumors 6502

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    Sep 26, 2006
    #4
    You're fine. A brand new battery hovers in the upper 90's for health. 99% is excellent.
     
  5. gonnabuyamac macrumors 6502

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    Sep 26, 2006
    #5
    for example, my battery is at 97% after thirteen cycles. you'll find that it fluctuates.
     
  6. riscy macrumors 6502a

    riscy

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    Jan 4, 2008
    Location:
    China
    #6
    This is something that pops up regularly. Until the battery level drops below 95% I think it does not go back to 100%.

    Run your Mac on battery until it goes to about 90%, then reconnect and all should be well.
     
  7. juanster macrumors 68020

    juanster

    Joined:
    Mar 2, 2007
    Location:
    toronto
    #7
    try calibrating your battery and reading again,, but then again,, 99% it's nothing to worry about..like most people have said, mine went down to96 really quickly but it has been at 92% for more than 4 months now...and after i calibrate it look...
     

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  8. doubleohseven macrumors 6502a

    doubleohseven

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    Jan 13, 2008
    Location:
    Sydney, Australia
    #8
    That's true. My battery's health went down to 91% and now it's back up to 100% :rolleyes:. What program are you using to determine your battery health?
     
  9. Lurchdubious macrumors 65816

    Lurchdubious

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    Oct 15, 2008
    Location:
    Texas
    #9
    How do you know how many cycles it's gone thru?
     
  10. kellte2 thread starter macrumors regular

    Joined:
    Jul 10, 2005
    #10
    I'm using istat pro. I was just worried that since its a brand new computer that the battery shouldn't lose health so quickly, BUT if it'll correct itself with calibration (which I've yet to do), then no biggie.
     
  11. gonnabuyamac macrumors 6502

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    Sep 26, 2006
    #11
    they're talking about the battery health, not the charge.
     
  12. gonnabuyamac macrumors 6502

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    Sep 26, 2006
    #12
    i use istat pro too. even the very first day i had the computer, the battery health was 97. the next time i charged it, it said 100. battery health just fluctuates, and no program is a perfect gauge.

    use it, and enjoy it. if the battery really does go bad, Apple is great about replacing defective ones (while under warranty)
     
  13. Lurchdubious macrumors 65816

    Lurchdubious

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    Oct 15, 2008
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    Texas
    #13
    sweet widget! Says mine is 100% health, 99% charge, 6 cycles.
     
  14. richard.mac macrumors 603

    richard.mac

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    Feb 2, 2007
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    #14
    jeebus you guys… 1%? ive done 28 cycles on my MacBook Pro Core Duo's 3rd battery and its down to 90%. spare a little empathy for me please. my Macbook Pro has always been a lemon though.
     
  15. juanster macrumors 68020

    juanster

    Joined:
    Mar 2, 2007
    Location:
    toronto
    #15
    mine says its 100% health but the battery only last about 2 -1/2 hours if unplugged,, before it used to last about 3 1/2 during the same classes doing the exact same thing no biggie tho, the computer it's almost 2 years old now so i am still okay with that
     
  16. Lurchdubious macrumors 65816

    Lurchdubious

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    Oct 15, 2008
    Location:
    Texas
    #16
    Whoa! I just checked my 2 yr old blackbook:

    100% Health, 100% charge, 576 cycles! I do still get over 4 hrs from a single charge. I guess the secret is to calibrate it on nearly every cycle, cuz that's what I've been doing.
     
  17. hogfaninga macrumors 65816

    hogfaninga

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    #17
    If true, that is the best I have ever heard. Congrats.
     
  18. JW008 macrumors 6502

    Joined:
    Apr 29, 2005
    #18
    I've got a question along these lines. I just bought a new MacBook and I want to keep the battery as healthy as possible.

    What's the best way to do that? I understand calibrating it every month or so, but for everyday usage? For example, I'm at work now and the MacBook is sitting at home, off and plugged in. Is this the best way to keep it? What about sleeping and plugged in (as that's usually how I leave it)?
     
  19. Lurchdubious macrumors 65816

    Lurchdubious

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    Oct 15, 2008
    Location:
    Texas
    #19
    I've apparently been pretty successful at keeping my battery healthy. I'm a student, on the go a lot, and my MB has never been plugged in for longer than 15 hrs, and that's generally just thru the night. I like to unplug it within a few hrs after it reaches full charge, but more importantly, I almost never plug it back in until the low-battery warning pops up. I try to do the same with cell phones. These lithium-ion batteries seem to last longest when they go thru a full cycle VERY often.
     
  20. Lurchdubious macrumors 65816

    Lurchdubious

    Joined:
    Oct 15, 2008
    Location:
    Texas
    #20
    Thanks! And yes, it's true, unless this istat pro widget is lying to me. I tend to believe it tho because the battery in my blackbook ALWAYS lasts a long time and I've been rather OCD about caring for it.
     
  21. Davidkoh macrumors 65816

    Joined:
    Aug 2, 2008
    #21
    On my old MB I had 100% health (never ever changed) until the 55th charge, then it dropped to 99%.
     
  22. thespyglass macrumors regular

    thespyglass

    Joined:
    Aug 22, 2008
    Location:
    Liverpool UK
    #22
    Wow! I'm definitely following your lead when I get my new machine. Looks like that new AluBook (MacBrick?) of yours is in excellent hands!
     
  23. Lurchdubious macrumors 65816

    Lurchdubious

    Joined:
    Oct 15, 2008
    Location:
    Texas
    #23
    lol, thanks! Yeah I was actually a little dismayed the other day when my (MacBrick ;)) battery was showing an expectancy of 3 hrs right after unplugging, but I had some stuff running and my screen was on full bright. I turned the screen down low and the expectancy jumped to over 5 hrs! These screens are power hogs. ...but beautiful!
     
  24. budkid macrumors regular

    Joined:
    Oct 15, 2008
    #24
    how do you calibrate it???
     
  25. GoCubsGo macrumors Nehalem

    GoCubsGo

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    Feb 19, 2005
    #25

    Here you go.
     

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