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1 Battery
Use your computer with battery power whenever ac power is unavailable.
For details, refer to the instructions in “Power Manager” on page 36
.
2 SIM card slot
If your computer has a wireless WAN feature, it may require a SIM (Subscriber Identication Module) card to
establish a wireless WAN (Wide Area Network) connections. Depending on the country of delivery, the SIM
card may be already installed in the SIM card slot.
3 Docking connector
With a ThinkPad X220 Ultrabase, you can extend the computer capabilities when you are in your ofce
or at home.
4 Memory-upgrade slot
You can increase the amount of memory in your computer by installing a memory module in the memory
bay. Memory modules are available as options.
Rear view
This section introduces rear view of your computer.
ThinkPad X220 and X220i rear view
Figure 9. ThinkPad X220 and X220i rear view
1 Power jack
2 Fan louvers (rear)
1 Power jack
The ac power adapter cable connects to the computer power jack to provide power to the computer and
charge the battery.
2 Fan louvers (rear)
The internal fan and louvers enable air to circulate in the computer and cool the central processor.
Chapter 1. Product Overview 17