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• the battery is fully charged.
To detach your computer from the ThinkPad X220 Ultrabase, do the following:
1. Make sure that the system lock key of the ThinkPad X220 UltraBase is in the unlocked (vertical) position.
2. Close the computer display.
3. If you are hot/warm-detaching the computer, press the eject request button of the ThinkPad X220
UltraBase. Then make sure that the eject inhibit indicator of the ThinkPad X220 UltraBase is off, and the
eject ready indicator lights up.
4. Release the eject lever on the left side of the ThinkPad X220 UltraBase 1 until the computer lifts up;
then remove the computer 2 .
Security feature
The lock of the ThinkPad X220 UltraBase has two positions.
154 User Guide