2–12 Maintenance and Service Guide
External component identification
Bottom components
Item Component Description
1
Hard drive bay Holds the hard drive, memory module slots, WLAN module (select models
only), and WWAN module (select models only).
2
Vents (4) Enable airflow to cool internal components.
✎
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.
3
Speaker Produces sound.
4
Battery bay Holds the battery and subscriber identity module (SIM).
5
Charge level indicator Displays the approximate remaining battery charge.
6
Accessory battery connector door Slides open to expose the accessory battery connector.
7
Accessory battery connector Connects an optional accessory battery.
8
Battery release latch Releases the battery from the battery bay.
9
Docking connector Connects an optional docking device.
