HP EliteBook 2740p Tablet-PC - Manual (Page 22)

Bottom components
Component Description
(1) Battery bay Holds the battery and subscriber identity module (SIM).
(2) SIM slot Contains a wireless subscriber identity module (SIM) (select
models only). The SIM slot is located inside the battery bay.
(3) Vents (5) 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.
(4) Hard drive bay Holds the hard drive, memory module slots, WLAN module
(select models only), and WWAN module (select models only).
(5) Docking connector Connects an optional docking device.
(6) Charge level indicator Displays the approximate remaining battery charge.
(7) Battery release latch Releases the battery from the battery bay.
(8) Accessory battery connector Connects an optional accessory battery.
(9) Accessory battery connector door Slides open to expose the accessory battery connector.
10 Chapter 1 Features