Dell Latitude D820 Technical Manual page 18

Configuring Power Management Settings
You can use the QuickSet Power Management Wizard or Windows Power Options Properties to
configure the power management settings on your computer.
•
To access the QuickSet Power Management Wizard, double-click the
For more information about QuickSet, click the Help button in the Power Management Wizard.
•
To access the Power Options Properties window, click the Start button→ Control Panel→
Performance and Maintenance→ Power Options. For information on any field in the Power
Options Properties window, click the question mark icon on the title bar and then click on the
area where you need information.
Charging the Battery
NOTE: With Dell™ ExpressCharge™, when the computer is turned off, the AC adapter charges a
completely discharged battery to 80 percent in about 1 hour and to 100 percent in approximately
2 hours. Charge time is longer with the computer turned on. You can leave the battery in the
computer for as long as you like. The battery's internal circuitry prevents the battery from
overcharging.
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.
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
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 more information about resolving problems with a battery, see
Replacing the Battery
CAUTION: Before performing these procedures, turn off the computer, disconnect the AC
adapter from the electrical outlet and the computer, disconnect the modem from the wall
connector and computer, and remove any other external cables from the computer.
NOTICE: You must remove all external cables from the computer to avoid possible connector
damage.
CAUTION: Using an incompatible battery may increase the risk of fire or explosion.
Replace the battery only with a compatible battery purchased from Dell. The battery is
designed to work with your Dell™ computer. Do not use a battery from other computers
with your computer.
For information about replacing the second battery, which is located in the media bay, see
Multimedia.
To remove the battery:
light flashes alternately green and orange. Disconnect
Power
icon in the taskbar.
Problems.
Using