Dell Latitude C840 User Manual Page 23
- Page / 119
- 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
Use a battery to power the computer when it is not connected to an electrical outlet. One battery is supplied as standard equipment in the battery bay.
Battery performance varies depending on operating conditions. Your computer typically runs for up to 3 hours with a single, fully charged, 8-cell battery.
Operating time can be reduced when you run power-intensive programs and when you use CD, DVD, or similar drives; PC Cards or Mini PCI cards; and high
display-brightness settings.
You can install an optional second battery in the module bay. With two fully charged batteries, you can double operating time.
You can check the battery charge before you insert the battery into the computer. You can also set power management options to alert you when the battery
charge is low.
Checking the Battery Charge
The Microsoft®Windows®power meter window and icon, the battery charge gauge and health gauge, and the low-battery warning provide information
on the battery charge.
Power Meter
The Windows power meter indicates the remaining battery charge. To check the power meter, double-click the icon on the taskbar. For more information
on the Power Meter tab, see "Power Management."
Charge Gauge
Before you insert a battery, press the status button on the battery charge gauge to illuminate the charge-level lights. Each light represents approximately 20
percent of the total battery charge. For example, if the battery has 80 percent of its charge remaining, four of the lights are on. If no lights appear, the battery
has no charge.
If the battery detects a fatal internal failure, the lights on each end of the charge gauge start blinking.
NOTE: Dell recommends using only 4400-mAh (or greater) batteries in this computer.
NOTE: Dell recommends that you connect your computer to an electrical outlet when writing to a CD.
CAUTION: UseonlyDell™batterymodulesthatareapprovedforusewiththis computer. Use of other types may increase the risk of fire or
explosion.
CAUTION: Do not dispose of your computer's battery in a fire or with normal household waste. Battery cells may explode. Discard a used battery
according to the manufacturer's instructions or contact your local waste disposal agency for disposal instructions. Dispose of a spent or damaged
battery promptly. See "Battery Disposal."
CAUTION: Misuse of the battery may increase the risk of fire or chemical burn. Do not puncture, incinerate, disassemble, or expose the battery to
temperaturesabove60°C(140°F).Keepthebatteryawayfromchildren.Handledamagedor leaking batteries with extreme care. Damaged
batteries may leak and cause personal injury or equipment damage.
- Notes, Notices, and Cautions 1
- Abbreviations and Acronyms 1
- About Your Computer 2
- Left Side View 5
- Right Side View 7
- Back View 8
- Bottom View 10
- Appendix 12
- FCC Notices (U.S. Only) 13
- Modem Regulatory Information 14
- Fax Branding 14
- IC Notice (Canada Only) 15
- CE Notice (European Union) 15
- CE Mark Notice 16
- New Zealand Telecom Warnings 16
- ENERGY STAR®Compliance 17
- VCCI Notice (Japan Only) 18
- Class A Device 19
- Class B Device 19
- BSMI Notice (Taiwan Only) 21
- Warranty and Return Policy 22
- Using a Battery 23
- Charging the Battery 24
- Removing a Battery 24
- Installing a Battery 25
- Storing a Battery 25
- Cleaning Your Computer 26
- Using Dell Diagnostics 28
- Advanced Testing 29
- Advanced Testing Help Menu 30
- Using the Display 32
- Reinstalling Software 34
- Using the Microsoft 35
- Windows 35
- XP Device Driver Rollback 35
- Using System Restore 35
- Creating a Restore Point 36
- Finding Information 38
- Fixing Problems 39
- Installing Parts 39
- Getting Help 40
- Problems With Your Order 41
- Product Information 41
- Before You Call 42
- Contacting Dell 42
- Glossary 51
- Dell™AccessDirect™Button 63
- Numeric Keypad 63
- Keyboard Shortcuts 64
- Touch Pad 65
- Track Stick 66
- Using the Module Bay 68
- Using the CD or DVD Tray 69
- Adjusting the Volume 69
- Passwords 71
- Using a Hard Drive Password 72
- Assigning an Asset Tag 72
- Deleting an Asset Tag Number 73
- Assigning an Owner Tag 73
- Deleting an Owner Tag 73
- Asset Tag Options 73
- Using PC Cards 75
- Removing a PC Card or Blank 76
- Power Management 78
- Power Options Properties 79
- Advanced Tab 80
- Hibernate Tab 80
- Intel SpeedStep®Tab 80
- Solving Problems 81
- Error Messages 82
- Video and Display Problems 85
- Sound and Speaker Problems 86
- Printer Problems 87
- Touch Pad or Mouse Problems 89
- External Keyboard Problems 90
- Unexpected Characters 90
- PC Card Problems 91
- Drive Problems 91
- Network Problems 93
- General Program Problems 93
- Error messages appear 94
- Windows XP 94
- A program stops responding 94
- A solid blue screen appears 94
- If Your Computer Gets Wet 95
- Adding and Replacing Parts 97
- Adding a Mini PCI Card 98
- Replacing the Hard Drive 100
- S-Video and Standard Audio 101
- S-Video and Digital Audio 102
- NVIDIA Video Controller 106
- Overview 108
- System Setup Screens 108
- Commonly Used Options 109
- Specifications 111
- Identifying Your Computer 115
- Packing the Computer 115
- Travel Tips 115
- Traveling by Air 116
- Help and Support Center 117
- Switching to Classic View 117
- Desktop Cleanup Wizard 117
- Program Compatibility Wizard 118
- Internet Connection Firewall 118
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