Fujitsu PRIMERGY TX120 S3 Upgrade And Maintenance Manual page 209

Expansion cards and backup units
Figure 103: Removing the BBU from the BBU holder
Ê Fold up the BBU (1) and at a slight angle remove it from the BBU holder (2).
Figure 104: Disconnecting the BBU cable from the BBU
Ê Carefully disconnect the BBU cable from the defective BBU.
Upgrade and Maintenance Manual 209
TX120 S3