Battery health--should I be worried?

Discussion in 'MacBook Pro' started by hoffmant, Aug 15, 2009.

  1. hoffmant macrumors member

    Joined:
    Jun 13, 2008
    #1
    I've had my 13" MBP for a couple of weeks. Coconut Battery tells me that I've had 7 cycles, but it lists the battery health at only 97%--5304 mAh capacity, while the original capacity was 5450.

    My black MacBook had close to 200 cycles and always read 100% health or better.

    I did a calibration last night, and it's still reading the same results.

    Is the 97% health & reduced capacity after 2 weeks something to be concerned about?

    Thanks!
     
  2. theclipper macrumors newbie

    Joined:
    Jul 26, 2009
    #2
    I'm a newbie wondering about this as well. I have only have my MBP a little over a week. I did the calibration a few days ago. Coconut Battery is only listing my capacity at 95% (5229 mAh). It says I have 10 load cycles. I'm not sure if this is normal or not. I just want to make sure I get the most out of my battery.

    Thanks!
     
  3. Whackintosh macrumors 6502

    Whackintosh

    Joined:
    Mar 8, 2009
    Location:
    Montreal, Quebec
    #3
    This seems to be a repeating thing. Ihave a 2008 UMBP that I got in early July as a refurb, and two different batteries have dropped significantly over just a handful of load cycles. This makes me wonder whether or not the batteries are absolutely fine and it's just a software bug making the machine read them strangely. I'll be bringing my machine in for a check-up next week (Apple phone support have no idea what could be causing this and have asked me to bring it in to a service center) and will report back here with nay info I learn from it.
     
  4. hoffmant thread starter macrumors member

    Joined:
    Jun 13, 2008
    #4
    I would appreciate any report you can give. The closest Apple store for me is nearly 2-hours away--I bought mine online.

    Thanks.
     
  5. NC MacGuy macrumors 603

    NC MacGuy

    Joined:
    Feb 9, 2005
    Location:
    The good side of the grass.
    #5
    You probably have something wrong with your MB. 100% after 200 cycles? That's great.

    My 1 week old 13 MBP is only reading 93%. I would love to have your 97% It's not grabbing any readings of 96-97-98-99% at all. Very steady at 93%. I see another Apple Store tiff on the horizon.:rolleyes:

    93% battery, do I get a discount?
    Did you see the lines for people wanting a 7% tax break on tax free holiday? Obviously that 7% is more a deal than Apple would like to think.

    I'm getting a bit tired of Apples non-user replaceable batteries not starting at 100% and staying there for at least the first week of ownership.

    2 MBA's Rev.A started at 96%, now at 87%. Rev.B 93%, now at 91%.
    08' 15" uMBP actually was pretty good at 98%.
    13" MBP 93%.
    7 month iPod Nano battery at less than 60% over 7 months
    8 month iPod Touch at 60-65% over 8 months.

    I just gots the baddest of luck, at least w. Apple batteries.

    And they were/are all calibrated. And re-calibrated.
     
  6. celticpride678

    Joined:
    Feb 15, 2009
    Location:
    Boston, MA
    #6
    Actually, I have a Late 2008 MacBook with 196 cycles on it and its health is 100%. I still get the 4 hours of battery life like day one.
     
  7. NC MacGuy macrumors 603

    NC MacGuy

    Joined:
    Feb 9, 2005
    Location:
    The good side of the grass.
    #7
    You just HAD to post that, didn't you.....:eek:
     
  8. theclipper macrumors newbie

    Joined:
    Jul 26, 2009
    #8
    I'd also love to hear a report from what the Apple store has to say. I can't believe that my battery is down to 95% capacity after a week.

    Thanks
     
  9. r0x0r macrumors newbie

    Joined:
    Aug 10, 2009
    #9
    I got my macbook pro 13" on friday and coconut battery is showing current battery charge as 87% and original battery capacity as 99% - does this sound about right?

    Im not entirely sure if i calibrated it correctly.
    I plugged it in when i took it out the box till charged. used it and ran it dry, turned it off and fully charged when light went green i took it off the charger and am now writing this? but it only says 4.5 hours left key lights are off and brightness and only 2 bars. what do you think??
     
  10. Adidas Addict macrumors 65816

    Adidas Addict

    Joined:
    Sep 9, 2008
    Location:
    England
    #10
    I am not sure I trust coconut battery. Heres a current screen grab of what it says about my 13" MBP battery. If you notice the current capacity is actually higher than the original capacity.

    [​IMG]
     
  11. hoffmant thread starter macrumors member

    Joined:
    Jun 13, 2008
    #11
    That's what it looked like on my black MacBook for a long time. Current capacity was higher than original.

    I checked the blackbook earlier tonight (it's my wife's laptop now). It has over 300 cycles now & is at 95% original capacity. My 2-wk old MBP shows between 96% & 98% on both Coconut Battery & iStat Pro...
     
  12. AngryApple macrumors 6502

    Joined:
    Dec 25, 2008
    #12
    It seems like the people who use their batteries regularly have better battery health than the people who are connected to AC power the majority of the time. Anyone else notice this?
     
  13. DoFoT9 macrumors P6

    DoFoT9

    Joined:
    Jun 11, 2007
    Location:
    Singapore
    #13
    dude chill, its fine!

    just dont discharge the battery every time (only do it once about every 30 cycles) and you will be fine :)
     
  14. theclipper macrumors newbie

    Joined:
    Jul 26, 2009
    #14
    How do I check my battery capacity on istatpro? I can't seem to figure it out.

    I wanted to see if it gives me the same rating as Coconut, which has now crept up to 97% after being at 95% all yesterday and today.

    Thanks
     
  15. hoffmant thread starter macrumors member

    Joined:
    Jun 13, 2008
    #15
    Click on the little "i" for settings, and under "sections," make sure that Battery is set to ON.
     
  16. DoFoT9 macrumors P6

    DoFoT9

    Joined:
    Jun 11, 2007
    Location:
    Singapore
    #16
    it doesnt not tell you capacity, just health. go into About this mac->more->battery.
     
  17. r0x0r macrumors newbie

    Joined:
    Aug 10, 2009
    #17
    hi guys.

    got my macbook on friday (3 days ago) and coconut battery is showing 99% current battery capacity! does this sound about right? surely it should still be 100% after only 5 cycles.

    i charged my macbook untill green after i got it out of the box, played on it untill it ran out of battery then shut it down. fully charged it again and unplugged it too use. it was my understanding that this procedure calibrated the battery??

    it said i had 5 hours battery remaining, with the illuminated keys on 1 bar and brightness mid way..
     
  18. iWright macrumors member

    Joined:
    Aug 15, 2009
    #18
    I'm in precisely the same condition as "theclipper" except that my battery reading is from iStat Pro
     
  19. NC MacGuy macrumors 603

    NC MacGuy

    Joined:
    Feb 9, 2005
    Location:
    The good side of the grass.
    #19
    istat nano, another widget will give you capacity along with %.
     

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  20. AnotherFanBoy macrumors regular

    Joined:
    Jul 5, 2009
    #20
    Ive had my macbook pro since friday, hardly used it on saturday and calibrated the battery today (sunday), its currently showing at 99% health with 2 cycles.

    Is this good/normal?
     
  21. tempusfugit macrumors 65816

    Joined:
    May 21, 2009
    Location:
    Chicago
    #21
    lol i love how much people are freaking out because their battery health is no longer 100%


    mine's 97% after 47 cycles.
     

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  22. iphonematt Guest

    Joined:
    Jul 10, 2007
    #22
    Lets sum this up.
    Batteries are unpredictable. Their capacity will very over time based on many factors such as age, how often it is used, temperature, and many other things. Basically, as long as your capacity is over 80% for the first 1000 cycles (on these new systems) your battery is fine. My batteries health jumps between 98% and 100%.
    When I got my unit, the battery health started at 99%. The health indicator is just a rough estimate because each battery will have a slightly different full charge capacity when it is manufactured.
     
  23. NC MacGuy macrumors 603

    NC MacGuy

    Joined:
    Feb 9, 2005
    Location:
    The good side of the grass.
    #23
    Yeah, I know. I'm on the fence about mine. I would like to have had it at 98-100% but instead it's between 93-95%. It'll be a fight taking it in because it's low but come on, is Apple going to give me a 5-7% discount when I need a replacement sooner than later? This is an up reading:
     

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  24. diamond3 macrumors 6502a

    Joined:
    Oct 6, 2005
    #24
    I'm having the same issue. I've got 3 battery-load cycles, it says 3 weeks but I've only had it running this past week.
    Current battery capacity: 5291 mAh
    Original battery capacity: 5450 mAh -----> 97% battery health

    When does it become a concern? in two days of almost only using the laptop plugged in, it has dropped from 5320 to 5291 mAh.

    I guess the real test will be this week when school starts back up and i'm using the battery more. When does one have a legitimate reason to take it back? What will happen if you take it in? Do they send it off to get it replaced?
     
  25. DoFoT9 macrumors P6

    DoFoT9

    Joined:
    Jun 11, 2007
    Location:
    Singapore
    #25
    oh stop worrying!! its fine just use it regularly a Li-Ion battery stored at 100% for 3 months will lose 30% of its full capacities) SO USE IT!
     

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