Using a Battery 43Power Management ModesStandby and Sleep ModeStandby mode (sleep mode in Microsoft Windows Vista™) conserves powerby turning off the display and the hard drive after a predetermined period ofinactivity (a time-out). When the computer exits standby or sleep mode, itreturns to the same operating state it was in before entering standby or sleepmode.NOTICE: If your computer loses AC and battery power while in standby or sleepmode, it may lose data.To enter standby mode in Windows XP, click the Start button, click Turn offcomputer, and then click Stand by.To enter sleep mode in Windows Vista, click the Windows Vista Start button, and then click Sleep.Depending on how you set the power management options in the PowerOptions Properties window or the QuickSet Power Management Wizard, youmay also use one of the following methods:• Press the power button.• Close the display.• Press .To exit standby or sleep mode, press the power button or open the display,depending on how you set the power management options. You cannot makethe computer exit standby or sleep mode by pressing a key or touching thetouch pad.Hibernate ModeHibernate mode conserves power by copying system data to a reserved area onthe hard drive and then completely turning off the computer. When thecomputer exits hibernate mode, it returns to the same operating state it wasin before entering hibernate mode.NOTICE: You cannot remove devices or undock your computer while yourcomputer is in hibernate mode.Your computer enters hibernate mode if the battery charge level becomescritically low.
