58 Using a BatteryNOTE: Some ExpressCards may not operate correctly after the computer exitshibernate mode. Remove and reinsert the card (see "Removing an ExpressCard orBlank" on page 71), or simply restart (reboot) your computer.To exit hibernate mode, press the power button. The computer may take ashort time to exit hibernate mode. You cannot make the computer exithibernate mode by pressing a key or touching the touch pad. For moreinformation on hibernate mode, see the documentation that came with youroperating system.Configuring Power Management SettingsYou can use the QuickSet Power Management Wizard or Windows PowerOptions Properties to configure the power management settings on yourcomputer. For more information about QuickSet, right-click the QuickSeticon in the taskbar and click Help.Accessing Power Options PropertiesWindows XPClick the Start button, point to Control Panel→ Performance andMaintenance, and then click Power OptionsWindows VistaClick the Windows Vista Start button , click Control Panel, click Systemand Maintenance, and then click Power Options.Charging the BatteryWhen you connect the computer to an electrical outlet or install a batterywhile the computer is connected to an electrical outlet, the computer checksthe battery charge and temperature. If necessary, the AC adapter then chargesthe battery and maintains the battery charge.NOTE: With Dell™ ExpressCharge™, when the computer is turned off, the ACadapter charges a completely discharged battery to 80 percent in about 1 hour andto 100 percent in approximately 2 hours. Charge time is longer with the computerturned on. You can leave the battery in the computer for as long as you like. Thebattery’s internal circuitry prevents the battery from overcharging.
