is 50% after 97 cycles of battery health normal?

Discussion in 'MacBook Pro' started by josueg942, Apr 4, 2009.

  1. josueg942 macrumors member

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  2. Tallest Skil macrumors P6

    Tallest Skil

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  3. kastenbrust macrumors 68030

    kastenbrust

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    #3
    Calibrated? If so how often

    How are you getting those readings? About my mac? iStat? or Coconut Battery?
    What model of Mac is it? How old is it? Do you have Applecare?
     
  4. josueg942 thread starter macrumors member

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    #4


    Nope... haven't

    iStat it is.

    Macbook Pro

    1 year

    Yes I do

    2.2 ghz c2d 128 vram 2 gigs of ram 120 gigs of hd
     
  5. miles01110 macrumors Core

    miles01110

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    #5
    Apple batteries are designed to hold 80% of their charge for 300 cycles, so I'd say your battery is defective and should be exchanged ASAP for a new one.
     
  6. truz macrumors 6502a

    truz

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    #6
    I purchased a replacement battery for my macbook pro (2.16 c2d) it currently is at 90 cycles and 93% battery health. Does this sound right? I don't think I'll have 80% health at 300 cycles.


     
  7. Pneublet macrumors member

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    #7
    I've got 103 cycles on a umbp and it's still at a 100%
     
  8. miles01110 macrumors Core

    miles01110

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    #8
    It doesn't sound totally out of the ordinary. I'd say your battery still falls within the "normal" category.
     
  9. josueg942 thread starter macrumors member

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    #9
    nice m8
     
  10. uiop. macrumors 68020

    uiop.

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    #10
    Welcome to MacRumors....where arrogance comes standard with ignorance.
     
  11. josueg942 thread starter macrumors member

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    #11

    Hey m8

    I just calibrated my battery.... did some gaming on battery power... had the games kill the battery off...
    let it sleep for like an hour even though it should be 5 hours...
    now I'm recharging my battery... it's half way to 100% and I already got 97% of battery health on 97 cycles...
    Thanks for your advice!
    Take much care - Josueg942 =]
     
  12. NickM macrumors 6502

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    #12
    Nice :)
    Whenever you can, I'd suggest letting it sit empty for the 5 hours that Apple suggests... just to let it drain to as empty as possible. Maybe let it sit empty overnight or something. Then just charge it back up to 100% and it should be good hopefully. (In case you were wondering, you CAN use the computer while it is charging back up to 100%)
     
  13. chr1s60 macrumors 68000

    chr1s60

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    #13
    I have had my MacBook Pro for 14 months and it is at 54% after 91 cycles. I don't calibrate mine as often as you are supposed to, but I have calibrated it multiple times within the 14 months I have had my MBP. I am unhappy with the battery performance, but since I can't really afford a new computer right now, I think I may have to buy a new battery.
     
  14. The Flashing Fi macrumors 6502a

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    #14
    I don't ever calibrate my battery. I'm not really concerned about some percentage. After a year and a half of ownership, I still get about 3 hours of battery life with the display about half-way dimmed.
     
  15. Abstract macrumors Penryn

    Abstract

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    #15
    The lifespan of a battery isn't just based on battery cycles. It's based on age as well. If your battery (or any Li-ion battery) is over 2 years old, the capacity will eventually start to drop rapidly like a rock. The capacity always decreases with time (and battery recharge cycles), but very slowly. However, the battery will eventually hit a wall, where its capacity will decrease very rapidly over a few months.


    Your battery sounds like it may be old, since your laptop is probably around 2 years old.
     
  16. josueg942 thread starter macrumors member

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    #16

    Yeah, I will let it drain tonight and let it sleep like that.
    The reason why I left it to sleep 1 hour was cos it's daytime and I have stuff to do...
     
  17. Lurchdubious macrumors 65816

    Lurchdubious

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    #17
    My blackbook is over 2 yrs old and last I checked it had nearly 700 cycles and still read 100%!

    My current UMB isn't doing quite as well. I just checked it and it's at 99% with 187 cycles, but it's been bouncing between 97-100% ever since I got it.
     
  18. Apple Corps macrumors 68030

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    #18
    Abstract provides a meaningful perspective. I have only 113 cycles, the battery has 47% capacity left, and is 31 months old.

    So - all in all - I can't really complain. Probably time for me to purchase a new battery.
     
  19. miles01110 macrumors Core

    miles01110

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    #19
    Sounds like you use it plugged into the adapter most of the time anyways. Do you even need a new battery?
     
  20. Apple Corps macrumors 68030

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    #20
    That would be correct. There are those times though....

    The battery life is really dropping now - unpredictable. What I want to avoid is purchasing a new battery 2 months before I upgrade to whatever and the buyer enjoys a nearly new battery.

    Also - not sure what additional risk I may be running of the battery swelling / leaking as it ages.
     
  21. frogcat macrumors member

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    #21
    Hey, does 167 cycles at 50% sound normal? I was thinking it did, but I just wanted to check. Thanks.
     
  22. Lurchdubious macrumors 65816

    Lurchdubious

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    #22
    Not at all. My blackbook just barely dropped to 99% after 2.5 yrs and well over 700 cycles. My UMB is not doing quite as well. it keeps bouncing between 97-99%, and I have 213 cycles on it.
     
  23. compuguy1088 macrumors 6502a

    compuguy1088

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    #23
    My battery is currently at 78 cycles, and I've had the mac for around 22 months. Current max battery charge is at 3306 mAh. It seems a tad low for the ammount of cycles it has....I got the machine in August of 07'

    [​IMG]
     
  24. frogcat macrumors member

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    #24
    My coconut battery looks just like that. I have a macbook pro August '07. It's at 50% health though. I doubt apple will replace our batteries. Maybe someone here has tried?
     
  25. Aaleck macrumors 6502a

    Aaleck

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    #25
    I'm at 60 cycles and at 92%, this is a replacement battery... my other one failed and couldn't hold a charge.... sounds a lot like your situation
     

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