Microsoft KB Archive/829484

= Portable Computer Battery Loses Its Charge Too Quickly, and the Computer Does Not Go into Hibernation =

Article ID: 829484

Article Last Modified on 10/30/2006

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APPLIES TO


 * Microsoft Windows 2000 Professional Edition
 * Microsoft Windows 2000 Server

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SYMPTOMS
Your portable computer battery may lose its charge more quickly than expected. Additionally, the portable computer never seems to go into hibernation.



CAUSE
This problem may occur with some universal serial bus (USB) mouse devices that resume (awaken) the portable computer from standby but that block the transition to hibernation.

This type of mouse device sends extraneous data to the computer when it resumes from standby, and the computer interprets this data as user input. The computer then aborts the transition to hibernation.

Note The battery discharges much faster in standby than in hibernation.



WORKAROUND
To work around this issue, configure the mouse to resume the system. To do this, follow these steps:
 * 1) Click Start, and then click Control Panel.
 * 2) Double-click System.
 * 3) Click the Hardware tab, and then click Device Manager.
 * 4) Expand Mice and other pointing devices.
 * 5) Right-click the mouse device that you want, and then click Properties.
 * 6) Click the Power Management tab.
 * 7) Click to select the Allow this device to bring the computer out of standby check box, and then click OK.



MORE INFORMATION
Your computer documentation may refer to different power-management or sleep states, such as S1, S3, and S4. These states determine what level of power-save mode your computer currently occupies.

In the S1 state, your hard disk spins down (slows significantly) when it is not in use, and your monitor shuts off when it is not in use.

In the S3 state (standby), the computer just barely pulls electricity from your power supply. Additionally, the CPU is turned off, and the random access memory (RAM) slowly refreshes the stored information instead of doing so at the standard rate.

In the S4 state (hibernation), your computer shuts down completely, and all the information in RAM is saved to a file on your hard disk. When you restart your computer, the saved file is restored back into memory, and your system appears exactly as you left it.

Keywords: kbhardware kbprb KB829484

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