Power ManagementPower-Saving States 3 - 73HibernateHibernate uses the least amount of power of all the power-saving states and savesall of your information on a part of the hard disk before it turns the system off. If apower failure occurs the system can restore your work from the hard disk; if a powerfailure occurs when work is saved only to memory, then the work will be lost. Hi-bernate will also return you to where you last left off within seconds. You shouldput your mobile PC into Hibernate if you will not use the computer for a period oftime, and will not have the chance to charge the battery.Shut DownYou should shut down the computer if you plan to install new hardware (don’t for-get to remove the battery and follow all the safety instructions in Chapter 6), planto be away from the computer for several days, or you do not need it to wake up andrun a scheduled task. Returning to full operation from shut down takes longer thanfrom Sleep or Hibernate.Figure 3 - 3Lock Button Menu