24 About Your ComputerCAUTION: Do not block, push objects into, or allow dust to accumulate in the air vents. Do not store yourcomputer in a low-airflow environment, such as a closed briefcase, while it is running. Restricting the airflowcan damage the computer or cause a fire.A I R V E N T S — The computer uses fans to create airflow through the vents, which prevents the computer fromoverheating.C O M M U N I C A T I O N S C A R D C O V E R — Covers the WLAN card slot and the Mobile Broadband card slot. For moreinformation, see "Using Networks" on page 75.BATTERY-BAY LATCH RELEASE — Releases the battery from the battery bay. See "Replacing the Battery" on page 43.B A T T E R Y C H A R G E G A U G E — Provides information on the battery charge status. See "Checking the Battery Charge"on page 40.B A T T E R Y — When a battery is installed, you can use the computer without connecting the computer to anelectrical outlet. For more information, see "Using a Battery" on page 39.