Fujitsu PRIMERGY RX1330 M1 Upgrade And Maintenance Manual page 188

Expansion cards and backup units
Figure 123: Installing the BBU in the holder
Ê At a slight angle, fit the BBU under the right retaining bracket on the holder
(1).
Ê Fold down the BBU until it locks in place (2).
188 Upgrade and Maintenance Manual
RX1330 M1