Dell Latitude C640 User Manual Page 34
- Page / 171
- Table of contents
- BOOKMARKS
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Using a Battery
Battery Performance
Checking the Battery Charge
Charging the Battery
Removing a Battery
Installing a Battery
Storing a Battery
Battery Performance
NOTE: Batteries for portable computers are covered only during the initial one-year period of the
limited warranty for your computer. For more information about the Dell warranty for your computer,
see the System Information Guide.
For optimal computer performance and to help preserve BIOS settings, operate your Dell™ portable
computer with the main battery installed at all times. Use a battery to run the computer when the computer
is not connected to an electrical outlet. One battery is supplied as standard equipment in the battery bay.
The computer ships standard with an 8-cell, 4460-mAh lithium-ion battery that optimizes system
performance. The computer also supports the 3800- and 3600-mAh batteries you may have received with
earlier Dell computers, but battery life is significantly decreased with these older batteries. Any battery rated
lower than 3600 mAh is not supported and will cause the light to flash orange, indicating insufficient
charge capacity.
Battery performance varies depending on operating conditions. With average usage, you may expect from 3
to 4 hours of operating life from a single fully loaded battery. You can install an optional second battery in
the module bay to significantly increase operating time.
Operating life is significantly reduced when you perform operations including, but not limited to, the
following:
NOTE: Dell recommends that you connect your computer to an electrical outlet when writing to a CD.
Using optical drives, especially DVD and CD-RW drives
Using wireless communications devices, PC Cards, or USB devices
Using high display-brightness settings, 3D screen savers, or other power-intensive programs such as
3D games
Running power-intensive programs
Running the computer in maximum performance mode
- Notes, Notices, and Cautions 1
- Abbreviations and Acronyms 1
- Finding Information 2
- Using Devices 3
- Fixing Problems 3
- Installing Parts 4
- About Your Computer 5
- Dell AccessDirect™ Button 8
- Left Side View 9
- Right Side View 10
- Back View 13
- Bottom View 17
- About Microsoft® Windows® XP 18
- Desktop Cleanup Wizard 19
- Program Compatibility Wizard 20
- Internet Connection Firewall 21
- Dell™ AccessDirect™ Button 22
- Numeric Keypad 23
- Keyboard Shortcuts 23
- System Functions 24
- Display Functions 24
- Power Management 24
- Speaker Functions 24
- Touch Pad 25
- Track Stick 26
- Changing the Track Stick Cap 28
- Using the Module Bay 29
- In Microsoft® Windows® XP 30
- In Windows 2000 30
- Using the CD or DVD Tray 31
- Adjusting the Volume 32
- Adjusting the Picture 32
- Using a Battery 34
- Checking the Battery Charge 35
- Charging the Battery 36
- Removing a Battery 37
- Installing a Battery 37
- Storing a Battery 38
- Power Options Properties 40
- In Windows XP 41
- Power Schemes Tab 41
- Alarms Tab 41
- Power Meter Tab 42
- Advanced Tab 42
- Hibernate Tab 42
- Intel SpeedStep® Tab 42
- Using PC Cards 44
- Installing a PC Card 45
- Removing a PC Card or Blank 46
- Traveling With Your Computer 47
- Travel Tips 48
- Passwords 50
- Using a Hard Drive Password 51
- Assigning an Asset Tag 52
- Deleting an Asset Tag Number 53
- Assigning an Owner Tag 53
- Deleting an Owner Tag 54
- Asset Tag Options 54
- Solving Problems 55
- Docking Power Considerations 56
- Error Messages 57
- Video and Display Problems 61
- Sound and Speaker Problems 63
- Printer Problems 65
- Touch Pad or Mouse Problems 67
- External Keyboard Problems 68
- Unexpected Characters 69
- Drive Problems 69
- PC Card Problems 72
- Network Problems 73
- General Program Problems 73
- If Your Computer Gets Wet 74
- Using the Display 77
- Dual Independent Display Mode 78
- Using the Dell Diagnostics 81
- Starting the Dell Diagnostics 82
- Advanced Testing 83
- Advanced Testing Main Screen 84
- Advanced Testing Help Menu 84
- Cleaning Your Computer 87
- Floppy Drive 88
- CD, CD-RW, and DVD Drives 88
- Reinstalling Software 89
- Windows XP 91
- Windows 2000 92
- Creating a Restore Point 94
- Adding and Replacing Parts 96
- Adding a Mini PCI Card 98
- Replacing the Hard Drive 100
- Adding a Modem 102
- S-Video Connection 104
- Composite Video Connection 106
- ATI Video Controller 109
- Overview 112
- System Setup Screens 113
- Commonly Used Options 113
- Performing a One-Time Boot 114
- Changing Printer Modes 115
- Changing COM Ports 115
- Enabling the Infrared Sensor 115
- Specifications 117
- Getting Help 123
- AutoTech Service 124
- Problems With Your Order 125
- Product Information 125
- Before You Call 126
- Contacting Dell 127
- Appendix 141
- FCC Notices (U.S. Only) 142
- Modem Regulatory Information 143
- IC Notice (Canada Only) 144
- CE Notice (European Union) 145
- CE Mark Notice 146
- New Zealand Telecom Warnings 147
- ENERGY STAR® Compliance 148
- VCCI Notice (Japan Only) 149
- Class A ITE 150
- Class B ITE 150
- Class A Device 151
- Class B Device 152
- BSMI Notice (Taiwan Only) 154
- NOM Information (Mexico Only) 155
- Macrovision Product Notice 156
- Warranty and Return Policy 156
- Glossary 157
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