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My ACER Apire Timeline 3820TG was shipped with the (large) 9-cell battery. I have bought a smaller spare 6-cell (original), but the machine will not recognize the new battery ('no battery detected') and consequently the battery does not charge. At first I thought the spare battery was defect, had it replaced free of charge, but the second one behave just the same. The spare battery is labeled 'AS10B41 (31CR19/66-2). I have tried to update the Microsoft ACPI driver, and I have updated the BIOS to 1.17, but nothing helps. I am running Windows 7 Home Premium (64 bit). Can you help.....?

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  • 4 more comments 
  • michael_deru Oct 01, 2010

    I just tried (both with and without battery in) change.

  • michael_deru Oct 01, 2010

    All battery related icons in the device manager are normal (green, no warning signs)

  • michael_deru Oct 01, 2010

    under Batteries I see (1) AC Adaptor, (2) Microsoft ACPI-compatible control method battery and (3) Microsoft-composite battery.

    under System-devices I see 5 ACPI devices. (1) ACPI-cover/lid, (2) ACPI-button for fast function, (3) ACPI button for hibernation and (4) (5) ACPI thermal-zone

    Sorry it is translated from OS is Danish, and it is the original that came installed on the machine.

    I doubt that it is a battery problem as I have two ones (brand new) and they behave the same.

  • michael_deru Oct 01, 2010

    I have tried that several times (and for the sake of good order I have just tried it again), after scanning for new HW the driver is installed, but the icon in the process bar still say 'no battery detected'.....

  • michael_deru Oct 01, 2010

    I allready replied to this.......tried out, but no change.

  • michael_deru Oct 03, 2010

    it is now the third time I get this advice......I have tried it and it does not help.



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Have you tried to cycle the notebook and battery?

Take out the battery and unplugged the power adapter. Press and hold the power button for 30 secs then release after 30secs. Put the battery/adapter back in.

Please do get back if this does not work.

Posted on Oct 01, 2010

  • 3 more comments 
  • Jose Cada
    Jose Cada Oct 01, 2010

    Kindly check your Device Manager and see if the battery is detected there. Please write back what you see.

  • Jose Cada
    Jose Cada Oct 01, 2010

    In the Device Manager , what do you see under ACPI?

    Is this the original OS that came with it?

    It is a known issue for Acer notebooks that they
    have a custom driver setup only designed for the original OS it comes
    with which may explain why none are found for Vista or newer.

    Another thing you can do just to see if this is a battery problem or not, try using the battery with a different notebook.

  • Jose Cada
    Jose Cada Oct 01, 2010

    Thank you Michael for getting back. As I understand nothing in the Device Manager indicates that it is not detecting the battery.

    One possibility is its power management software may have become corrupt.

    In order to correct problems with the battery's power management software, follow the steps below.

    1. Click Start and type device in the search field, then select Device Manager .

    2. Expand the Batteries category.

    3. Under the Batteries category, right-click the Microsoft ACPI Compliant Control Method Battery listing, and select Uninstall .

    WARNING: Do not remove the Microsoft AC Adapter driver or any other ACPI compliant driver.

    4. On the Device Manager taskbar, click Scan for hardware changes .

    Alternately, select Action > Scan for hardware changes .
    will scan your computer for hardware that doesn't have drivers
    installed, and will install the drivers needed to manage your battery's
    power. The notebook should now indicate that the battery is charging.

  • Jose Cada
    Jose Cada Oct 01, 2010

    Sounds like we have done every possible solution here; updated the BIOS, reinstalled the driver and power cycled.

    I suggest calling Acer for support if this is still under warranty.

  • Jose Cada
    Jose Cada Oct 01, 2010

    Sounds like we have done every possible solution here; updated the BIOS, reinstalled the driver and power cycled.

    I suggest calling Acer for support if this is still under warranty.



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