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  1. #1


    Member Since
    Nov 26, 2010
    Posts
    2
    Fluctuating Macbook Battery Issues
    I have a Macbook from late 2008. My computer no longer recognizes a battery. When I initially started having problems with it, it's cycle count was at 367, but it still would charge and be fine. Within a few weeks, however, it would be fully charged and abruptly shut down completely. I've done the hard restart thing mentioned on these forums a few times and it used to work for a day or two, but now it doesn't work at all. Here's my battery info:

    Battery Information:

    Model Information:
    Serial Number: DP-YYYY-0-2b8d
    Device name: ASMB016
    Pack Lot Code: 0003
    PCB Lot Code: 0000
    Firmware Version: 0110
    Hardware Revision: 0500
    Cell Revision: 0102
    Charge Information:
    Charge remaining (mAh): 0
    Fully charged: No
    Charging: No
    Full charge capacity (mAh): 0
    Health Information:
    Cycle count: 0
    Battery Installed: No
    Amperage (mA): 0
    Voltage (mV): 0

    After doing the SMC restart, this is what shows up:

    Battery Information:

    Model Information:
    Serial Number: DP-YYYY-0-2b8d
    Manufacturer: DP
    Device name: ASMB016
    Pack Lot Code: 0003
    PCB Lot Code: 0000
    Firmware Version: 0110
    Hardware Revision: 0500
    Cell Revision: 0102
    Charge Information:
    Charge remaining (mAh): 607
    Fully charged: No
    Charging: Yes
    Full charge capacity (mAh): 4651
    Health Information:
    Cycle count: 423
    Condition: Good
    Battery Installed: Yes
    Amperage (mA): 1730
    Voltage (mV): 11395

    However, it will only last for a small amount of time - between 4 hours and a day. Then, the computer will abruptly shut down, only run when it is plugged in, and not recognize the battery.

    Do I need a new battery? Or, is this a hardware problem that I need to take to get fixed?

  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    47,095
    Specs:
    27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, iPhone 6+, 3 iPods, El Capitan
    You didn't mention if the machine was working OK from AC power only. In any event, it does look like you need a new battery. Be sure to buy one of good quality and not some eBay knock off.

  3. #3


    Member Since
    Nov 26, 2010
    Posts
    2
    Thanks for your response. Yes, it works flawlessly with the AC connected.

    I'm just worried about purchasing a new battery and then having it be something else. How can I be sure it's a battery issue?

  4. #4


    Member Since
    Nov 26, 2010
    Posts
    3
    My Macbook Pro does this as well. I have to keep the backlight on the lowest possible without it being black, and even then it shuts off occasionally. It only stays on when plugged in; turns off right when you unplug it.

  5. #5

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    47,095
    Specs:
    27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, iPhone 6+, 3 iPods, El Capitan
    Quote Originally Posted by uofmstephanie View Post
    Thanks for your response. Yes, it works flawlessly with the AC connected.

    I'm just worried about purchasing a new battery and then having it be something else. How can I be sure it's a battery issue?
    You can't be 100% sure but chances are the battery should be replaced. If it was the MagSafe adapter, the machine would not operate from AC power. Also, your battery has 423 charge - recharge cycles on it which is over the 300 cycles that Apple states is normal for that battery.

    You can always bring your machine on in to Apple and have them test the battery for you - just to make sure.

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