Dell Vostro 1200 (Early 2009) - Manual (Page 35)

Using a Battery 35
To exit hibernate mode, press the power button. The computer may take a
short time to exit hibernate mode. You cannot make the computer exit
hibernate mode by pressing a key or touching the touch pad. For more
information on hibernate mode, see the documentation that came with your
operating system.
Configuring Power Management Settings
You can use the Windows Power Options Properties to configure the power
management settings on your computer.
Accessing Power Options Properties
Windows XP
Click the Start button, point to Control Panel→ Performance and
Maintenance, and then click Power Options
Windows Vista
Click the Windows Vista Start button , click Control Panel, click System
and Maintenance, and then click Power Options.
Charging the Battery
When you connect the computer to an electrical outlet or install a battery
while the computer is connected to an electrical outlet, the computer checks
the battery charge and temperature. If necessary, the AC adapter then charges
the battery and maintains the battery charge.
NOTE: If the battery is hot from being used in your computer or being in a hot
environment, the battery may not charge when you connect the computer to an
electrical outlet.
The battery is too hot to start charging if the light flashes alternately
green and orange. Disconnect the computer from the electrical outlet and
allow the computer and the battery to cool to room temperature. Then
connect the computer to an electrical outlet to continue charging the battery.
For information about resolving problems with a battery, see "Power
Problems" on page 91.
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