4 Replies Latest reply: Jul 24, 2012 6:31 PM by Bimmer 7 Series
JustAGirl17 Level 1 (0 points)

I had my battery replaced yesterday on my MBP 13", running 10.6.8, from mid 2010. I charged it to 100% last night and worked with the AC adapter for a while. iStat Pro said my health was at 100%. I then turned off my computer for the night, and this morning, with 0 cycle count still, my battery health is at only 99%. Today I'm doing a calibration of my battery, but I'm concerned that it's already gone down 1%. I know 1% isn't a big deal, but shouldn't it have stayed at 100 for more than a few hours, which is really all it's gotten since I had it turned off?


Here's the current stats of the battery


Battery Information:


  Model Information:

  Serial Number:          W02226LC8D3LC

  Manufacturer:          SMP

  Device name:          bq20z451

  Pack Lot Code:          0000

  PCB Lot Code:          0000

  Firmware Version:          0201

  Hardware Revision:          000a

  Cell Revision:          0165

  Charge Information:

  Charge remaining (mAh):          5414

  Fully charged:          No

  Charging:          No

  Full charge capacity (mAh):          5717

  Health Information:

  Cycle count:          0

  Condition:          Normal

  Battery Installed:          Yes

  Amperage (mA):          -690

  Voltage (mV):          12228

MacBook Pro (13-inch Mid 2010), Mac OS X (10.7.4), BATTERY REPLACED - 7/19/2012
  • stedman1 Level 9 (69,759 points)

    Your battery is fine. The battery health will fluctuate, today it may be 99% tomorrow 100% next day 98%.

  • Bimmer 7 Series Level 6 (10,275 points)

    You're fine.  As stedman1 says, it changes all the time.


    My battery goes from 5720 one day to 5610 to 5724 and now to 5684.


    If your battery lasts you over 5 or 6 hours in normal use - not using games, then you have nothing to worry about.

  • JustAGirl17 Level 1 (0 points)

    Sorry to bother you, but I'm just curious because it now says only 94% ... and that seems like a greater fluctuation than necessary. It's also now only capable of 5412 mAh. I'm mostly concerned because my applecare will be running out before this battery would actually fail so if it is defective and going down this quickly, I'd rather know now... Apple doesn't do refurbished batteries in their repairs like they can do some other parts, right? Thanks for your time. 

  • Bimmer 7 Series Level 6 (10,275 points)

    are you getting over 5 hours of use from it?


    if so, try not to worry about it so much...........


    like i said before, my battery keeps on changing state.....now i'm at 5507.  last night i was at 5601.


    if however, you feel that it's not performing as it should, then take it to Apple and have them test it for you before your warranty expires.....


    good luck..