Toshiba S2 User Manual page 125

Sample inserting the charged battery
The battery pack has been designed so that you cannot install
it with reverse polarity.
If the battery does not slide into the slot easily, move the
battery release lock to the unlocked position and try again. Do
not force the battery into position.
10 Reset the battery release lock to the locked position.
11 Turn the computer right side up.
12 Reconnect any cables.
13 Restart the computer.
Mobile Computing
Changing batteries
125