Toshiba TECRA 9100 Series Maintenance Manual page 221

4.1 General
4. Slide the Latch in the direction of the arrow.
5. Grasp and pull the battery pack forward and lift it out.
6. Remove the battery.
TECRA 9100 Maintenance Manual (960-347)
Latch
Figure 4-2 Removing the battery pack
4 Replacement Procedures
Battery
4-9