MBPbattery - 19 cycles and 66% health???

Discussion in 'MacBook Pro' started by dcains, Jul 8, 2008.

  1. dcains macrumors regular

    Joined:
    Mar 27, 2007
    #1
    Hi Group:

    95% of the time my MBP sits on my desk, always plugged into the AC adapter, and it's ~13 months old. I haven't done the battery calibration routine in maybe 6 months, but iStat showed battery charge and health both at 100%. So, last night I watched a few DVD movies to start the calibration "drain" and then went to bed with Sirius radio on to kill the rest of the battery. After letting the battery recharge all day, iStat shows 19 cycles, 100% charge, but only 66% health! Leopard's system info also shows 19 cycles and 100% charge, but it says "check battery" under health.

    Anyone know what's happened here? Was the battery likely at 100% health before the calibration, and/or did the calibration damage it? Is this a warranty issue? I've got Apple Care, but I want to make certain I describe properly to them what's going on (and hopefully that I didn't cause the damage).

    My wife has a MB, which is about a month newer than this MBP, and I was going to calibrate the battery on that one, too, but now I'm afraid to. Thanks in advance for any assistance you guys may offer.

    Dean
     
  2. RITZFit macrumors 65816

    RITZFit

    Joined:
    Sep 16, 2007
    Location:
    In my Corner
    #2
    yes, that is a warranty issue. I've had a batter (with a few more cycles than yours) replaced under warranty because it wasn't holding its charge properly.
     
  3. Eric. macrumors regular

    Joined:
    Mar 30, 2008
    #3
    I think that Apple's guarantee on batteries is up to a year or like 300 cycles (could be wrong on that part). They might not cover it.
     
  4. dcains thread starter macrumors regular

    Joined:
    Mar 27, 2007
    #4
    Thanks guys. I'll call Apple in the AM and see what they have to say. Looking at other threads just now, it seems their policy on batteries and warranty replacement has some "flexibility" in how it's implemented. Seems like with only 19 cycles, though, that I've got somewhat of a chance for a replacement.
     
  5. bc008 macrumors 68000

    bc008

    Joined:
    Aug 6, 2007
    Location:
    Michigan
    #5
    i have around 30 cycles on my macbook pro, and am at 98% health, never calibrated...

    definitely call applecare.
     
  6. 88888888 macrumors 6502a

    Joined:
    May 28, 2008
    #6
    my health is 99%
    1 cycle.
    -.-
    not a good sign
    only 2 weeks old.
     
  7. TSE macrumors 68030

    Joined:
    Jun 25, 2007
    Location:
    St. Paul, Minnesota
    #7
    Hey, I am just wondering. When Apple does agree to replace a battery, do they just send you a new one, or do they make you send in your whole computer?

    I am at 14 cycles, 91% health, does that give me a replacement?
     
  8. Watabou macrumors 68040

    Watabou

    Joined:
    Feb 10, 2008
    Location:
    United States
    #8
    I think my battery's health went down too after I calibrated it today. I already calibrated the battery twice this month.

    I have 15 cycles and only 96% health. Is this normal and would i be eligible for a replacement? After the first calibration, its capacity was ~5300-54000 not its ~5100-5200. This is seriously concerning me. :confused:
     
  9. dcains thread starter macrumors regular

    Joined:
    Mar 27, 2007
    #9
    I wouldn't be worried (or pissed) if mine was anywhere in 90% range, but I'm really unhappy at 66% and 19 cycles. Here are the specific details from the system profiler:

    Charge Information:
    Charge remaining (mAh): 3473
    Fully charged: Yes
    Charging: No
    Full charge capacity (mAh): 3632
    Health Information:
    Cycle count: 19
    Condition: Check battery
    Battery Installed: Yes
    Amperage (mA): 0
    Voltage (mV): 12357

    Obviously, it's not accepting anything near a full charge (5500 mAh), although the battery charge indicator says it's at 96% right now. Maybe somehow the calibration wasn't accurate, and the charging cycle is ending too soon? I'll ask Apple about that when I speak to them. I'm hoping it's that simple, because just before the calibration health was 100% and I had a 5500mAh charge. Seems odd that such a thing should happen the way it did.
     
  10. bobcan macrumors 6502a

    bobcan

    Joined:
    Jan 8, 2007
    Location:
    Sunny but Cold.. Canada
    #10
    Hmm...

    I am not certain with the Apple Batt's, but as a USER of several Rechargeable Devices I am certain that you "should use the Battery somewhat to Help it's Health... even though Lith ION technology is better than ever!! If you really are only going to Cycle it 19 times in 13 months you may also not require a MBP I am guessing... ?? :confused:

    Perhaps the Battery may "get some zip back" if you do a few Full Cycles and recalibrate it..?? On the otherhand, the Battery may well ONLY have a year Warranty I believe, even though the Low Cycle # they :apple: may not want to talk about it... :(

    I frequently (once a month) completely drain mine (I have Main and Spare as well...) and my last battery (first Gen 1.83GHz MBP) had near 175 cycles and near 90% when I sold the machine... pretty decent I thought!!!

    Please keep us informed on this... Hope it goes well!!!
     
  11. orangeillini14 macrumors regular

    Joined:
    Jul 1, 2008
    #11
    I've had my computer for two weeks and I'm at 25 cycles, 99% health. Is 25 cycles a lot for two weeks? Is there a good way to reduce cycles or is it just because I use my MBP a lot?
     
  12. bobcan macrumors 6502a

    bobcan

    Joined:
    Jan 8, 2007
    Location:
    Sunny but Cold.. Canada
    #12
    Just like a Gas Tank/ Gauge...

    The Cycles only state "How many times you Fill/ Empty the Battery" so to speak... If you need and are using the MBP in a Portable Sense then that's what you will see... you may perhaps want to "Run it right down" before putting back on Charge sometimes though. You must often Recharge sometime thru the day to get to 25/ 14 days..??? Such is Life... Enjoy it!! :D
     
  13. kockgunner macrumors 68000

    kockgunner

    Joined:
    Sep 24, 2007
    Location:
    Vancouver, Canada
    #13
    this is normal, i believe. mine was like that too and it hovers between 98-99% after 21 cycles. it's never 100% the moment you use it.
     
  14. dcains thread starter macrumors regular

    Joined:
    Mar 27, 2007
    #14
    *update*

    Well, maybe my MBP just needed a good night's sleep? Checked the battery just now, and it's back to normal:

    Charge Information:
    Charge remaining (mAh): 5479
    Fully charged: Yes
    Charging: No
    Full charge capacity (mAh): 5479
    Health Information:
    Cycle count: 19
    Condition: Good
    Battery Installed: Yes
    Amperage (mA): 12
    Voltage (mV): 12596

    iStat shows health at 99%, too. Not sure why, though. After the calibration yesterday I did restart the system, and that's when I first saw the bad results. Last night I shut the system down before bed, started it just now, and all is well. Guess I'll just leave it alone and not bother calling Apple.

    Dean
     
  15. orangeillini14 macrumors regular

    Joined:
    Jul 1, 2008
    #15
    Yeah, I've been waiting till it's at about 10% battery life until I plug it back in.
     

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