HP EliteBook 8440p - Manual (Page 21)

Bottom components
Component Description
(1) Battery bay Holds the battery.
(2) Battery release latch Releases the battery from the battery bay.
(3) SIM slot (select models only) Contains a wireless subscriber identity module (SIM). The SIM slot
is located inside the battery bay.
(4) Docking connector Connects an optional docking device.
(5) Accessory battery connector Connects an optional accessory battery.
(6) Vents (7) Enable airflow to cool internal components.
NOTE: The computer fan starts up automatically to cool internal
components and prevent overheating. It is normal for the internal
fan to cycle on and off during routine operation.
(7) WWAN/WLAN module compartment Contains a WWAN module and a WLAN module (select models
only).
CAUTION: To prevent an unresponsive system, replace the
wireless module only with a wireless module authorized for use in
the computer by the governmental agency that regulates wireless
devices in your country or region. If you replace the module and
then receive a warning message, remove the module to restore
computer functionality, and then contact technical support through
Help and Support.
Identifying hardware 9