IBM ThinkPad T40 series Hardware Maintenance Manual page 73

Holding the battery release lever in the unlocked position
2 , remove the battery pack 3 .
3
When installing: Install the battery pack along the slide
b
rails on the left and right sides of the
battery-pack slot. Then make sure that
both battery latches, a and b , are
locked, as in the following figure.
ThinkPad T40, T40p, T41 Series
Removing and replacing a FRU
2
a
69