34 About Your Computer
MEMORY MODULE/COIN-CELL BATTERY COVER —Covers the DIMM B memory
module and the coin-cell battery. For additional information, see "Adding and
Replacing Parts" on page153.
RIGHT SPEAKER —To adjust the volume of the integrated speaker, press the volume
control buttons or the mute button.
MINI-CARD COVER —Covers Mini-Cards (WLAN, WWAN, or WPAN) or a Flash
Cache Module (FCM) (see "Wireless Mini-Cards" on page170 and "Flash Cache
Module" on page179) .
BATTERY —When a battery is installed, you can use the computer without
connecting the computer to an electrical outlet (see "Using a Battery" on page51).
BATTERY CHARGE/HEALTH GAUGE —Provides information on the battery charge (see
"Checking the Battery Charge" on page52).
BATTERY RELEASE LATCHES —Releases the battery (see "Replacing the Battery" on
page56
for instructions).
CAUTION: Do not block, push objects into, or allow dust to accumulate in the air
vents. Do not store your computer in a low-airflow environment, such as a closed
briefcase, while it is running. Restricting the airflow can damage the computer or
cause a fire.
AIR VENTS —The computer uses an internal fan to create airflow through the vents,
which prevents the computer from overheating. The computer turns the fan on when
the computer gets hot. Fan noise is normal and does not indicate a problem with the
fan or the computer.
HARD DRIVE —Stores software and data.