Using a Battery 37NOTE: Some PC Cards may not operate correctly after the computer exits hibernate mode. Remove and reinsertthe card (see "Removing a Card or Blank" on page 62), or simply restart (reboot) your computer.To exit hibernate mode, press the power button. The computer may take a short time to exit hibernatemode. You cannot make the computer exit hibernate mode by pressing a key or touching the touch pador track stick. For more information on hibernate mode, see the documentation that came with youroperating system.Configuring Power Management SettingsYou can use the QuickSet Power Management Wizard or Windows Power Options Properties toconfigure the power management settings on your computer. For more information about QuickSet,right-click the QuickSet icon in the taskbar and click Help.Accessing Power Options PropertiesWindows XPClick Start→ Control Panel→ Performance and Maintenance→ Power Options.Windows VistaClick Start→ Control Panel→ System and Maintenance→ Power Options.Charging the BatteryWhen you connect the computer to an electrical outlet or install a battery while the computer isconnected 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: With Dell™ ExpressCharge™, when the computer is turned off, the AC adapter charges a completelydischarged battery to 80 percent in about 1 hour and to 100 percent in approximately 2 hours. Charge time is longerwith the computer turned on. You can leave the battery in the computer for as long as you like. The battery’s internalcircuitry prevents the battery from overcharging.If the battery is hot from being used in your computer or being in a hot environment, the battery maynot 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. Disconnectthe computer from the electrical outlet and allow the computer and the battery to cool to roomtemperature. 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.
