Using a Battery 25Using a BatteryBattery PerformanceCAUTION: Before you begin any of the procedures in this section, follow the safety instructionslocated in the Product 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 computerwhen it is not connected to an electrical outlet. One battery is supplied as standard equipment inthe battery bay.NOTE: Battery capacity (the time it can hold a charge) decreases over time. Depending on how often thebattery is used and the conditions under which it is used, you may need to purchase a new battery duringthe life of your computer.Battery operating time varies depending on operating conditions. Operating time is significantlyreduced when you perform operations including, but not limited to, the following:• Using DVD, DVD-R, and CD-RW drives• Using wireless communications devices, PC Cards, or USB devices• Using high-brightness display settings, 3D screen savers, or other power-intensive programssuch as 3D games• Running the computer in maximum performance mode (see "Power Management" in theDell Inspiron Help file.)NOTE: It is recommended that you connect your computer to an electrical outlet when writing to aCD or DVD.You can set power management options to alert you when the battery charge is low.CAUTION: Using an incompatible battery may increase the risk of fire or explosion. Replace thebattery only with a compatible battery purchased from Dell. The lithium-ion battery is designed to workwith 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 acharge, call your local waste disposal or environmental agency for advice on disposing of a lithium-ionbattery. See "Battery Disposal" in the Product Information Guide.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 batteryaway from children. Handle damaged or leaking batteries with extreme care. Damaged batteries mayleak and cause personal injury or equipment damage.