The Win32_Battery WMI class does not report the EstimatedChargeRemaining attribute correctly on a Windows XP-based portable computer (833600)


The information in this article applies to:

  • Microsoft Windows XP 64-Bit Edition Version 2003
  • Microsoft Windows XP 64-Bit Edition Version 2002
  • Microsoft Windows XP Professional
  • Microsoft Windows XP Home Edition

SYMPTOMS

When you query the Win32_Battery Windows Management Instrumentation (WMI) class on your Microsoft Windows XP-based portable computer, the EstimatedChargeRemaining attribute does not appear in the list of returned attributes.

CAUSE

This problem occurs because the EstimatedChargeRemaining attribute always has a value of NULL in Windows XP.

RESOLUTION

Service pack information

To resolve this problem, obtain the latest service pack for Microsoft Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

322389 How to obtain the latest Windows XP service pack

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows XP service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel. 
   Date         Time   Version         Size       File name   Platform
   -------------------------------------------------------------------
   29-Jan-2004  18:47  5.1.2600.1337   1,268,224  Cimwin32.dll     x86    
   29-Jan-2004  18:41  5.1.2600.1337   4,965,376  Cimwin32.dll   IA-64

Note Because of file dependencies, this hotfix requires Microsoft Windows XP Service Pack 1 (SP1).

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Microsoft Windows XP Service Pack 2.

MORE INFORMATION

The Win32_Battery WMI class represents a battery that is connected to the computer. The EstimatedChargeRemaining attribute reports an estimate of the percentage of the full charge that is remaining. In Windows XP, the EstimatedChargeRemaining attribute always has a value of NULL. In Microsoft Windows 2000, the EstimatedChargeRemaining attribute is correct.

For more information about the Win32_Battery WMI class, visit the following Microsoft Web site:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wmisdk/wmi/win32_battery.asp



For additional information about the terminology that is used in this article, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Modification Type:MinorLast Reviewed:10/27/2005
Keywords:kbHotfixServer kbQFE kbWinXPsp2fix kbQFE kbenv kbWinXPpreSP2fix kbfix kbbug KB833600 kbAudEndUser
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