•thebatteryisfullycharged.
TodetachyourcomputerfromtheThinkPadX220Ultrabase,dothefollowing:
1.Mak esurethatthesystemlockkeyoftheThinkPadX220UltraBaseisintheunlocked(vertical)position.
2.Closethecomputerdisplay.
3.Ifyouarehot/warm-detachingthecomputer,presstheejectrequestbuttonoftheThinkPadX220
UltraBase.ThenmakesurethattheejectinhibitindicatoroftheThinkP adX220UltraBaseisoff,andthe
ejectreadyindicatorlightsup.
4.ReleasetheejectleverontheleftsideoftheThinkPadX220UltraBase1untilthecomputerliftsup;
thenremovethecomputer2.
Securityfeature
ThelockoftheThinkPadX220UltraBasehastwopositions.
154UserGuide