13" Battery not Calibrated

Discussion in 'MacBook Pro' started by mgartner0622, Jul 29, 2010.

  1. mgartner0622 macrumors 65816

    mgartner0622

    Joined:
    Jun 6, 2010
    Location:
    Colorado, USA
    #1
    Hello-

    I have a Mid 2009 2.53GHz 13" MacBook Pro with the 1000 charge cycle battery.

    Sometimes, I can only get at most 2 hours out of my battery after it's been calibrated numerous times. My percentage full drops like crazy, until my notebook goes into hibernation mode. If I plug it in, and boot back up, and pull the plug, it just goes back into hibernation mode.

    HOWEVER-
    I can turn on my MacBook, and pull the adapter, then put it in target disk mode, and get a full four hours of life from it without the adapter attached. This is AFTER the notebook has hibernated due to "Low Battery"

    Like I said before, i've tried calibrating it, and pretty much everything else, iStat Pro says my battery has 93% health after 169 Charge Cycles. I've even brought it to the Apple Store and they've said it's perfectly OK after running a battery test via apple hardware test.

    I mainly use it connected to a cinema display, it has not really been used on battery besides a few charge cycles a month for the past 6 months. When i first got it, I put about 3 full cycles on a day.

    What could be the problem?

    Attached is my battery information from system profiler:

    Battery Information:

    Model Information:
    Manufacturer: DP
    Device name: bq20z451
    Pack Lot Code: 0000
    PCB Lot Code: 0000
    Firmware Version: 0003
    Hardware Revision: 0002
    Cell Revision: 0100
    Charge Information:
    Charge remaining (mAh): 4527
    Fully charged: No
    Charging: No
    Full charge capacity (mAh): 5077
    Health Information:
    Cycle count: 170
    Condition: Normal
    Battery Installed: Yes
    Amperage (mA): -1046
    Voltage (mV): 12014

    System Power Settings:

    AC Power:
    System Sleep Timer (Minutes): 0
    Disk Sleep Timer (Minutes): 0
    Display Sleep Timer (Minutes): 12
    Wake On AC Change: No
    Wake On Clamshell Open: Yes
    Wake On LAN: Yes
    Display Sleep Uses Dim: No
    Battery Power:
    System Sleep Timer (Minutes): 10
    Disk Sleep Timer (Minutes): 10
    Display Sleep Timer (Minutes): 2
    Wake On AC Change: No
    Wake On Clamshell Open: Yes
    Current Power Source: Yes
    Display Sleep Uses Dim: Yes
    Reduce Brightness: Yes

    Hardware Configuration:

    UPS Installed: No

    AC Charger Information:

    Connected: No
    Charging: No

    Power Events:

    Next Scheduled Events:

    Type: Wake or Power On
    Scheduled By: Repeating Event
    Time: 7/30/10 7:00 AM

    Type: Shut Down
    Scheduled By: Repeating Event
    Time: 7/30/10 1:45 AM

    Repeating Events:

    Type: Wake or Power On
    Time: 6:00 AM every day

    Type: Shut Down
    Time: 1:45 AM every day


    Thank you for your help!
     
  2. AppleNewton macrumors 68000

    AppleNewton

    Joined:
    Apr 3, 2007
    Location:
    1 Finite Place
    #2
    Thats the thing right that is a little off to me.
    I tend to use my 13" plugged in alot at the desk...i guess it gets alittle too convenient.

    One thing i noticed when my full charge capacity is the battery life tends to go down with it. so what i do is charge it all the way, let it drain to about 90% charge it back up and then later on after a few hours drain it down to about 80% and charge it back up.

    it seemed to kick up the full charge capacity and kind of flex the battery a bit more...but thats in my own experience. so it may not be the "official" way but its what i noticed improved my battery life before i allowed it be without a powersource for too long. right now my full charge is at 5600 it was at 5300 a few months ago.
     
  3. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #3
  4. mgartner0622 thread starter macrumors 65816

    mgartner0622

    Joined:
    Jun 6, 2010
    Location:
    Colorado, USA
    #4
    Thank you, but I've already taken a look at that and followed everything closley. My battery just seems to be acting strange.
     
  5. Jasonbot macrumors 68020

    Jasonbot

    Joined:
    Aug 15, 2006
    Location:
    The Rainbow Nation RSA
    #5
    My 13" MacBook Pro is also acting weird. I use it connected to a screen often and although the max capacity is still rather high it just doesn't last as long as it did a few months ago.:confused::confused:
     

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