A warning message is displayed immediately after you upgrade to Windows 7 on certain LG notebooks: "Consider replacing your battery"

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Article ID: 981200 - View products that this article applies to.
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SYMPTOMS

After you upgrade to Windows 7 on certain LG notebooks, the Windows Battery Meter displays the following warning message:
Consider replacing your battery
This warning is displayed even if a new battery is inserted into the laptop.

CAUSE

This problem occurs because of a code defect in the system firmware (BIOS) of some LG notebooks. These include the R500 family of notebooks.

The Advanced Configuration and Power Interface (ACPI) firmware does not correctly initialize and report the Design Capacity field of the static battery information structure that is retrieved by using the _BIF method. Therefore, the Design Capacity that is reported to Windows may be much larger than the Last Full Charge capacity that is also reported in the static battery information structure. The Windows Battery Meter divides the Last Full Charge capacity by the Design Capacity to determine battery health. The Windows Battery Meter displays the "Consider replacing your battery" message when the Last Full Charge Capacity is less than 40% of the Design Capacity. When this issue occurs, the Design Capacity is reported as much larger than Last Full Charge capacity. Therefore, the "Consider replacing your battery" message is always shown.

RESOLUTION

To resolve this problem, contact the computer manufacturer to obtain a BIOS update for your computer. For more information, visit the following LG Web sites:
[BIOS] LG Notebook(R500) System BIOS Ver F.20

[BIOS] LG Notebook(P300) System BIOS Ver F.19

[BIOS] LG Notebook(R405) System BIOS Ver F.20  
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products. Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.

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Article ID: 981200 - Last Review: January 27, 2011 - Revision: 2.0
APPLIES TO
  • Windows 7 Enterprise
  • Windows 7 Home Basic
  • Windows 7 Home Premium
  • Windows 7 Professional
  • Windows 7 Starter
  • Windows 7 Ultimate
Keywords: 
kbtshoot kbexpertisebeginner kbsurveynew kbprb KB981200

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