Conserving Battery Power, Low-Battery Warning | Dell JU373 specification

Low-Battery Warning

NOTICE: To avoid losing or corrupting data, save your work immediately after a low-battery warning. Then connect the computer to an electrical outlet, or install a second battery in the media bay. If the battery runs completely out of power, hibernate mode begins automatically.

A pop-up window warns you when the battery charge is approximately 90 percent depleted. If two batteries are installed, the low-battery warning means that the combined charge of both batteries is approximately 90 percent depleted. The computer enters hibernate mode when the battery charge is at a critically low level.

You can change the settings for the battery alarms in QuickSet or the Power Options Properties window. See "Configuring Power Management Settings" on page 44 for information about accessing QuickSet or the Power Options Properties window.

Conserving Battery Power

Perform the following actions to conserve battery power:

•Connect the computer to an electrical outlet when possible because battery life is largely determined by the number of times the battery is used and recharged.

•Place the computer in standby mode or hibernate mode when you leave the computer unattended for long periods of time. See "Power Management Modes" on page 43.

•Use the Power Management Wizard or the Power Options Properties window to select options to optimize your computer’s power usage. These options can also be set to change when you press the power button, close the display, or press <Fn><Esc>.

NOTE: See "Configuring Power Management Settings" on page 44 for information on conserving battery power.

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Using a Battery

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Dell JU373 manual Conserving Battery Power, Low-Battery Warning

Contents

User’s Guide August JU373 Contents Accessing Power Options Properties Customizing the Touch Pad Contents Using a Monitor as Your Primary Display Installing a PC Card or ExpressCard Checking Your Wireless Network CardMobile Broadband/Wireless Wide Area Network Wwan Microsoft Windows Firewall 101 103 When to Use the Dell Diagnostics Viewing the System Setup Screens 141 124127 142 Automated Order-Status Service Macrovision Product Notice Contents Contents Finding Information What Are You Looking For? Find It Here May not ship with your computer At support.dell.com Service Tag and Microsoft Windows License Label What Are You Looking For? Dell Support Website support.dell.com Dell Support Utility Windows Help and Support Operating System Media Finding Information About Your Computer Front View Power button About Your Computer Y B O a R D S T a T U S L I G H T S Left Side View D I O C O N N E C T O R S Right Side View Back View Network connector RJ-45 Connects serial devices, such as a mouse or handheld device About Your Computer Bottom View About Your Computer Setting Up Your Computer Transferring Information to a New ComputerMicrosoft Windows XP To prepare a new computer for the file transfer Setting Up Your Computer Microsoft Windows Vista Turning Off Your Computer Setting Up Your Computer Using a Battery Battery Performance Checking the Battery Charge Dell QuickSet Battery Meter Check the Battery Health Microsoft Windows Power MeterCheck the Battery Charge Charge Gauge Conserving Battery Power Low-Battery Warning Power Management Modes Standby and Sleep ModeHibernate Mode Windows XP Configuring Power Management SettingsAccessing Power Options Properties Windows Vista Charging the Battery Replacing the Battery Storing a Battery Using the Keyboard Numeric Keypad System Functions BatteryKey Combinations CD or DVD Tray Power Management Speaker FunctionsMicrosoft Windows XP Logo Key Functions Microsoft Windows Vista Logo Key Functions TAB Touch Pad Customizing the Touch Pad Using the Display Adjusting BrightnessUsing a Projector Windows Vista Using Both a Monitor and Your Computer Display Using a Monitor as Your Primary Display Click the Settings tab→ Advanced→ Displays tab Windows Vista Using the Display Using Multimedia Playing CDs or DVDs DVD player includes the following basic buttons Adjusting the Volume Adjusting the Picture Connecting Your Computer to a TV or Audio Device Video TV-out connector Connector Output connector Video and Standard Audio Video and S/PDIF Digital Audio Composite video adapter Composite Video and Standard Audio Standard audio cable Composite Video and S/PDIF Digital Audio Composite video adapter Component Video and Standard Audio Component video adapter Component Video and S/PDIF Digital Audio Component video adapter Enabling S/PDIF Digital Audio Setting Up the Cyberlink CL Headphones Enabling S/PDIF in the Windows Audio Driver Enabling the Display Settings for a TV Click Advanced Setting Up and Using Networks Connecting a Network or Broadband Modem Cable Wireless Local Area Network Wlan What You Need to Establish a Wlan Connection Checking Your Wireless Network Card Start Button and Connect To OptionOrder Confirmation for Your Computer Setting Up and Using Networks Connecting to a Wlan Determining the Wireless Network Device Manager Click Start→ Settings→ Control Panel→ Network Connections Completing the Connection to the Wlan Mobile Broadband/Wireless Wide Area Network Wwan Enabling/Disabling the Wireless Network Card Checking Your Dell Mobile Broadband Card Connecting to a Mobile Broadband Network Microsoft Windows Firewall Setting Up and Using Networks Using Cards Card Types Installing a PC Card or ExpressCard Card BlanksExtended Cards Using Cards Removing a Card or Blank Securing Your Computer PasswordsAbout Passwords Security Cable Lock Using a Primary or System Password Type of Password Features Using an Administrator Password Using a Hard Drive Password Trusted Platform Module TPM Enabling the TPM Feature Security Management Software Using the Security Management Software Computer Tracking SoftwareActivating the Security Management Software If Your Computer Is Lost or Stolen 100 Cleaning Your Computer Computer, Keyboard, and Display Floppy Drive CDs and DVDs102 Dell Diagnostics TroubleshootingDell Technical Update Service When to Use the Dell Diagnostics 104 Dell Diagnostics Main Menu 105Option Function 106 OptionTab Function Clicking the Dell Support Icon Accessing the Dell Support UtilityDell Support Utility 107 Double-Clicking the Dell Support Icon Solving ProblemsDrive Problems 108 Hard drive problems Optical drive problemsProblems writing to an optical drive 109 Mail, Modem, and Internet Problems 110 Error Messages 111 Ieee 1394 Device Problems 112 Lockups and Software Problems Solid blue screen appears Other software problemsProgram is designed for an earlier Windows operating system 114 Memory Problems Network Problems115 Power Problems 116 Printer Problems 117 Scanner Problems Sound and Speaker ProblemsNo sound from speakers 118 Touch Pad or Mouse Problems No sound from headphones119 Display is blank Video and Display ProblemsIf the display is blank 120 If the display is difficult to read If only part of the display is readable121 122 123 System Setup ProgramOverview Windows Vista, click Start → Help and Support Changing the Boot Sequence Viewing the System Setup ScreensSystem Setup Screens Commonly Used Options Performing a One-Time Boot 125 Changing COM Ports Enabling the Infrared Sensor126 Drivers Reinstalling SoftwareWhat Is a Driver? Identifying Drivers Microsoft Windows Vista Reinstalling Drivers and UtilitiesUsing Windows Device Driver Rollback 128 Using the Drivers and Utilities Media 129 Manually Reinstalling Drivers 130 Restoring Your Operating System 131 Using Microsoft Windows System Restore Starting System Restore132 Undoing the Last System Restore Enabling System Restore133 Using Dell PC Restore and Dell Factory Image Restore Windows XP Dell PC Restore134 135 Windows Vista Dell Factory Image Restore 136 Before you Begin Using the Operating System MediaReinstalling Windows XP or Windows Vista 137 138 Dell QuickSet 139 140 Packing the Computer Traveling With Your ComputerIdentifying Your Computer 141 Travel Tips Traveling by Air142 Getting Help Obtaining Assistance143 Technical Support and Customer Service DellConnect Online Services144 Automated Order-Status Service Problems With Your OrderAutoTech Service 145 Before You Call 146 147 Diagnostics Checklist 148 Contacting Dell 149 150 Processor Specifications151 System Information Ports and Connectors 152Memory Video 153Communications Audio 154 Display Keyboard Battery155 Touch Pad 156 AC Adapter 157 PhysicalEnvironmental 158 FCC Class B AppendixFCC Notice U.S. Only 159 Macrovision Product Notice 160 Glossary 161 162 163 Product ID 164 165 166 167 168 169 Module bay See media bay 170 NIC See network adapter 171 172 173 174 Video resolution See resolution 175 176