13" Battery not Calibrated

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

  1. mgartner0622 macrumors 65816


    Jun 6, 2010
    Colorado, USA

    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.

    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


    Apr 3, 2007
    1 Finite Place
    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


    May 16, 2008
  4. mgartner0622 thread starter macrumors 65816


    Jun 6, 2010
    Colorado, USA
    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


    Aug 15, 2006
    The Rainbow Nation RSA
    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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