50 Using a BatteryPower Management ModesStandby ModeStandby mode conserves power by turning off the display and the hard driveafter a predetermined period of inactivity (a time-out). When the computerexits standby mode, it returns to the same operating state it was in beforeentering standby or sleep mode.NOTICE: If your computer loses AC and battery power while in standby or sleepmode, it may lose data.To enter standby mode, click Start→Turn off computer→Stand by.NOTE: If your computer is not responding, pressing the power button for more than10 seconds turns it off.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:• 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 make thecomputer exit standby or sleep mode by pressing a key or touching the touch pad.Hibernate ModeHibernate mode conserves power by copying computer data to a reserved areaon the 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.To enter hibernate mode, click the Start button, click Turn off computer,press , and then click Hibernate.
