Lenovo X200T - Thinkpad 12.1" 160GB Hardware Maintenance Manual page 93

Table 10. Removal steps of battery pack
Unlock the battery release lever. Holding the battery release lever in the
unlocked position 1 , remove the battery pack in the direction shown by arrow
2 .
1
2
When installing: Install the battery pack along the slide rails of the slot. Then
make sure that the battery release lever is in the locked position.
85
Removing and replacing a FRU