Lenovo ThinkPad X220i (English) User Guide - Page 33
Rear view, ThinkPad X220 and X220i rear view - thinkpad x220 power adapter
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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 Identification 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 office 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