HP ProBook 4321s Notebook-PC - Manual (Page 9)

Resolving a low battery level when the computer cannot exit
Hibernation ....................................................................................... 80
Calibrating a battery ........................................................................................................... 80
Step 1: Fully charge the battery ........................................................................ 80
Step 2: Disable Hibernation and Sleep ............................................................. 81
Step 3: Discharge the battery ............................................................................ 81
Step 4: Fully recharge the battery ..................................................................... 83
Step 5: Reenable Hibernation and Sleep .......................................................... 83
Conserving battery power .................................................................................................. 83
Storing a battery ................................................................................................................ 84
Disposing of a used battery ............................................................................................... 84
Replacing the battery ......................................................................................................... 84
Testing an AC adapter ....................................................................................................................... 85
Shutting down the computer ............................................................................................................... 85
6 Drives ............................................................................................................................................................. 87
Identifying installed drives .................................................................................................................. 87
Handling drives ................................................................................................................................... 87
Improving hard drive performance ..................................................................................................... 89
Using Disk Defragmenter ................................................................................................... 89
Using Disk Cleanup ........................................................................................................... 89
Using HP 3D DriveGuard ................................................................................................................... 90
Identifying HP 3D DriveGuard status ................................................................................. 90
Using HP 3D DriveGuard software .................................................................................... 91
Using external drives .......................................................................................................................... 92
Using optional external devices ......................................................................................... 92
Replacing the hard drive .................................................................................................................... 93
7 External devices .......................................................................................................................................... 107
Using a USB device ......................................................................................................................... 107
Connecting a USB device ................................................................................................ 107
Removing a USB device .................................................................................................. 107
Using USB legacy support ............................................................................................... 108
Using an eSATA device ................................................................................................................... 109
Connecting an eSATA device .......................................................................................... 109
Removing an eSATA device ............................................................................................ 109
Using external drives ........................................................................................................................ 111
Using optional external devices ....................................................................................... 111
8 External media cards .................................................................................................................................. 112
Using Media Card Reader cards ...................................................................................................... 112
Inserting a digital card ...................................................................................................... 112
Removing a digital card ................................................................................................... 113
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