Hp ProBook 6555b Notebook-PC Manuel d'utilisateur Page 78
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Using battery power
When a charged battery is in the computer and the computer is not plugged into external power, the
computer runs on battery power. When the computer is plugged into external AC power, the computer
runs on AC power.
If the computer contains a charged battery and is running on external AC power supplied through the
AC adapter, the computer switches to battery power if the AC adapter is disconnected from the
computer.
NOTE: The display brightness is decreased to save battery life when you disconnect AC power. To
increase display brightness, use the fn+f10 hotkey or reconnect the AC adapter.
You can keep a battery in the computer or in storage, depending on how you work. Keeping the battery
in the computer whenever the computer is plugged into AC power charges the battery and also protects
your work in case of a power outage. However, a battery in the computer slowly discharges when the
computer is off and unplugged from external power.
WARNING! To reduce potential safety issues, use only the battery provided with the computer, a
replacement battery provided by HP, or a compatible battery purchased from HP.
Computer battery life varies, depending on power management settings, programs running on the
computer, display brightness, external devices connected to the computer, and other factors.
Displaying the remaining battery charge
▲
Double-click the Power Meter icon in the notification area, at the far right of the taskbar.
– or –
Select Start > Control Panel > Performance and Maintenance > Power Options > Power
Meter tab.
Most charge indicators report battery status as both a percentage and as the number of minutes of
charge remaining:
●
The percentage indicates the approximate amount of charge remaining in the battery.
●
The time indicates the approximate running time remaining on the battery if the battery continues
to provide power at the current level. For example, the time remaining will decrease when a DVD
is playing and will increase when a DVD stops playing.
When a battery is charging, a lightning bolt icon may be superimposed over the battery icon on the
Power Meter screen.
Inserting or removing the battery
CAUTION: Removing a battery that is the sole power source can cause loss of information. To prevent
loss of information, save your work and initiate Hibernation or shut down the computer through Windows
before removing the battery.
To insert the battery:
1. Turn the computer upside down on a flat surface, with the battery bay toward you.
68 Chapter 5 Power management
- HP ProBook User Guide 1
- Safety warning notice 3
- Table of contents 5
- 1 Features 11
- 2 Chapter 1 Features 12
- Identifying hardware 3 13
- 4 Chapter 1 Features 14
- Identifying hardware 5 15
- 6 Chapter 1 Features 16
- Identifying hardware 7 17
- 8 Chapter 1 Features 18
- Identifying hardware 9 19
- 10 Chapter 1 Features 20
- Front components 21
- Right-side components 22
- Identifying hardware 13 23
- Left-side components 24
- Rear components 25
- Bottom components 26
- Display components 27
- 18 Chapter 1 Features 28
- Identifying the labels 29
- Component 30
- (2) Serial number 30
- (3) Product number 30
- (4) Warranty period 30
- Using the wireless controls 32
- Using the wireless button 32
- Setting up a WLAN 34
- Protecting your WLAN 34
- Connecting to a WLAN 36
- Roaming to another network 36
- Inserting a SIM 37
- Removing a SIM 38
- 8. Replace the battery 39
- 10. Turn on the computer 39
- WLAN connection is very weak 43
- Connecting a modem cable 44
- Selecting a location setting 45
- Using pointing devices 49
- Using the keyboard 49
- Using the keyboard 41 51
- Using HP QuickLook 3 52
- Using keypads 52
- Component Description 53
- 4Multimedia 55
- Multimedia software 56
- Checking your audio functions 58
- Using the DisplayPort 60
- Identifying the optical drive 62
- Playing a CD, DVD, or BD 62
- Configuring AutoPlay 62
- Changing DVD region settings 63
- Copying a CD, DVD, or BD 64
- Troubleshooting 65
- A disc does not play 66
- Webcam (select models only) 70
- 5 Power management 72
- Using the Power Meter 73
- Using power schemes 74
- Customizing power schemes 75
- Using external AC power 76
- Connecting the AC adapter 77
- Using battery power 78
- Charging a battery 79
- Managing low battery levels 80
- Resolving a low battery level 81
- Calibrating a battery 82
- Step 3: Discharge the battery 83
- Conserving battery power 84
- Storing a battery 84
- Disposing of a used battery 85
- Replacing the battery 85
- Testing an AC adapter 86
- Shutting down the computer 86
- Identifying installed drives 88
- Handling drives 88
- Using Disk Defragmenter 90
- Using Disk Cleanup 90
- Using HP 3D DriveGuard 91
- Replacing a hard drive 96
- 88 Chapter 6 Drives 98
- Replacing an optical drive 100
- 7 External devices 103
- Using USB legacy support 104
- Using a 1394 device 105
- Using external drives 107
- Using a docking device 108
- 8 External media cards 109
- Configuring an ExpressCard 111
- Inserting an ExpressCard 111
- Inserting a smart card 113
- Removing a smart card 113
- 9 Memory modules 115
- 10 Security 124
- Using passwords 125
- BIOS administrator password 126
- Setting a DriveLock password 130
- Entering a DriveLock password 131
- Changing a DriveLock password 132
- Removing DriveLock protection 133
- Securing system devices 135
- Using antivirus software 137
- Using firewall software 138
- ProtectTools software Help 140
- 130 Chapter 10 Security 140
- Installing a security cable 141
- 11 Software updates 142
- Updating the BIOS 143
- Downloading a BIOS update 144
- Updating programs and drivers 145
- 12 Backup and recovery 146
- Backing up your information 147
- Performing a recovery 148
- 13 Computer Setup 149
- Computer Setup menus 150
- File menu 151
- Security menu 151
- System Configuration menu 152
- Computer Setup menus 143 153
- Computer Setup menus 145 155
- 14 MultiBoot 156
- 15 Management and printing 162
- 16 Routine care 168
- Cleaning procedures 169
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