You can install an optional second battery in the media bay to significantly increase operating time. For additional information about using a second battery, see "Media Bay" in the online User’s Guide for your computer.
NOTE: Battery operating time (the time the battery can hold a charge) decreases over time. Depending on how often the battery is used and the conditions under which it is used, you may need to purchase a new battery during the life of your computer.
Battery operating time varies depending on operating conditions. Operating time is significantly reduced when you perform operations including, but not limited to, the following:
•Using optical drives
•Using wireless communications devices, PC Cards, ExpressCards, media memory cards, or USB devices
•Using
•Running the computer in maximum performance mode (See "Configuring Power Management Settings" in the online User’s Guide for your computer.)
NOTE: It is recommended that you connect your computer to an electrical outlet when writing to a CD or DVD.
You can check the battery charge (see "Checking the Battery Charge" on page 14) before you insert the battery into the computer. You can also set power management options to alert you when the battery charge is low (see "Configuring Power Management Settings" in the online User’s Guide for your computer).
CAUTION: Using an incompatible battery may increase the risk of fire or explosion. Replace the battery only with a compatible battery purchased from Dell. The battery is designed to work with your Dell computer. Do not use a battery from other computers with your computer.
CAUTION: Do not dispose of batteries with household waste. When your battery no longer holds a charge, call your local waste disposal or environmental agency for advice on disposing of a
CAUTION: Misuse of the battery may increase the risk of fire or chemical burn. Do not puncture, incinerate, disassemble, or expose the battery to temperatures above 65°C (149°F). Keep the battery away from children. Handle damaged or leaking batteries with extreme care. Damaged batteries may leak and cause personal injury or equipment damage.
Checking the Battery Charge
The Dell QuickSet Battery Meter, the Microsoft Windows Power Meter window and 
icon, the battery charge gauge and health gauge, and the
Dell™ QuickSet Battery Meter
If Dell QuickSet is installed, press <Fn><F3> to display the QuickSet Battery Meter. The Battery Meter displays status, battery health, charge level, and charge completion time for the battery in your computer.
For more information about QuickSet, 
icon in the taskbar, and click Help.
14
Quick Reference Guide
