HP EliteBook 2740p Base Model Tablet PC User Manual Page 85
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3. Plug the other end of the power cord into an AC outlet (3).
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.
Finding battery information in Help and Support
The Battery information section of the Help and Support Learning Center provides the following tools
and information:
●
Battery Check tool to test battery performance
●
Information on calibration, power management, and proper care and storage to maximize battery
life
●
Information on battery types, specifications, life cycles, and capacity
To access Battery information:
▲
Select Start > Help and Support > Learning centers. Scroll to the battery information once HP
Support Assistant opens.
Using battery power 73
- HP EliteBook 2740p User Guide 1
- Safety warning notice 3
- Table of contents 5
- 1Features 13
- 2 Chapter 1 Features 14
- Identifying hardware 3 15
- Buttons and switches 16
- Identifying hardware 5 17
- Front components 18
- Right-side components 19
- Left-side components 20
- Rear components 21
- Bottom components 22
- Identifying hardware 11 23
- 12 Chapter 1 Features 24
- Identifying hardware 13 25
- Identifying the labels 26
- 2 Using the tablet 27
- Rotating the display 28
- Notebook mode 30
- Rotating the display 19 31
- 3Networking 32
- Using the wireless controls 33
- Using the wireless button 33
- Using a WLAN 36
- Connecting to a WLAN 37
- Roaming to another network 38
- Inserting a SIM 39
- Removing a SIM 40
- Network icon is not displayed 44
- WLAN connection is very weak 45
- Connecting a modem cable 46
- Selecting a location setting 47
- 8. Click OK twice 50
- 38 Chapter 3 Networking 50
- Using pointing devices 52
- Using the pen 55
- Pressure sensitivity 56
- Calibrating the pen 57
- Using the pen holder 57
- Setting pen preferences 58
- Tapping (or clicking) 58
- Flicking 58
- Dragging 59
- Scrolling 59
- Rotating 60
- Pinching 61
- Using touch screen settings 62
- Using the keyboard 63
- Using hotkeys 65
- Initiating Sleep 66
- Switching the screen image 66
- Decreasing screen brightness 67
- Increasing screen brightness 67
- Using HP Quick Launch Buttons 68
- Using HP QuickLook 70
- Using HP QuickWeb 71
- 5 Multimedia 72
- Multimedia software 73
- Checking your audio functions 75
- 64 Chapter 5 Multimedia 76
- Webcam tips 78
- Adjusting webcam properties 78
- 6 Power management 81
- Using the battery meter 82
- Using power plans 82
- Customizing power plans 83
- Using external AC power 84
- Using battery power 85
- Using Battery Check 86
- Charging a battery 87
- Managing low battery levels 88
- Calibrating a battery 89
- Step 3: Discharge the battery 90
- Conserving battery power 91
- Storing a battery 92
- Disposing of a used battery 92
- Replacing the battery 92
- Testing an AC adapter 93
- Shutting down the computer 93
- Identifying installed drives 95
- Handling drives 96
- Using Disk Defragmenter 97
- Using Disk Cleanup 97
- Using HP 3D DriveGuard 98
- 8. Replace the battery 103
- 10. Turn on the computer 103
- 8 External devices 104
- Using USB legacy support 105
- Using a 1394 device 106
- Using external drives 107
- Using the docking connector 108
- 9 External media cards 109
- Removing a digital card 110
- Configuring an ExpressCard 111
- Inserting an ExpressCard 111
- Removing an ExpressCard 112
- Inserting a smart card 113
- Removing a smart card 114
- 10 Memory modules 115
- 11 Security 119
- Using passwords 120
- BIOS administrator password 121
- Setting a DriveLock password 124
- Entering a DriveLock password 124
- Changing a DriveLock password 124
- Removing DriveLock protection 125
- Securing system devices 127
- Using antivirus software 129
- Using firewall software 130
- Installing critical updates 131
- 120 Chapter 11 Security 132
- Installing a security cable 133
- 12 Software updates 134
- Updating the BIOS 136
- Downloading a BIOS update 137
- Updating programs and drivers 139
- 13 Backup and recovery 140
- Backing up your information 141
- Performing a recovery 143
- Using f11 144
- 14 Computer Setup 146
- Computer Setup menus 147
- File menu 148
- Security menu 148
- System Configuration menu 149
- Computer Setup menus 139 151
- Computer Setup menus 141 153
- 15 MultiBoot 154
- 16 Management and printing 160
- Enabling the iAMT solution 164
- Change Intel ME Password 165
- 17 Cleaning guidelines 167
- Cleaning procedures 168
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