6 Power management
Setting power devices ........................................................................................................................ 38
Using power-saving states ................................................................................................. 38
Initiating and exiting Sleep ................................................................................ 38
Initiating and exiting Hibernation ....................................................................... 39
Conserving power .............................................................................................................. 39
Using the battery meter ..................................................................................................... 39
Using power plans ............................................................................................................. 40
Viewing the current power plan ......................................................................... 40
Selecting a different power plan ........................................................................ 40
Customizing power plans .................................................................................. 40
Setting password protection on wakeup ............................................................................ 41
Using external AC power .................................................................................................................... 41
Connecting AC power ........................................................................................................ 42
Testing an AC adapter ....................................................................................................... 43
Using battery power ........................................................................................................................... 43
Identifying batteries ............................................................................................................ 43
Finding battery information in Help and Support ............................................................... 44
Using Battery Check .......................................................................................................... 44
Displaying the remaining battery charge ........................................................................... 44
Removing or inserting the primary battery ......................................................................... 44
Charging a battery ............................................................................................................. 45
Maximizing battery discharge time .................................................................................... 46
Managing low battery levels .............................................................................................. 46
Identifying low battery levels ............................................................................. 46
Resolving a low battery level ............................................................................. 48
Resolving a low battery level when external power is available ....... 48
Resolving a low battery level when a charged battery is
available ........................................................................................... 48
Resolving a low battery level when no power source is
available ........................................................................................... 48
Resolving a low battery level when the computer cannot exit
Hibernation ....................................................................................... 48
Using the accessory battery (select models only) ............................................................. 48
Identifying the accessory battery components .................................................. 49
Inserting or removing an accessory battery ...................................................... 49
Battery charging and discharging sequence .................................................... 51
Calibrating a battery ........................................................................................................... 51
Storing a battery ................................................................................................................ 52
Disposing of a used battery ............................................................................................... 52
Replacing the battery ......................................................................................................... 52
Shutting down the computer ............................................................................................................... 52
7 Drives and external devices
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