Avago Technologies 3ware 9550SXU-4LP - Manual (Page 34)

Chapter 2. Installing the Battery Backup Unit
30 3ware 9550SX Serial ATA RAID Controller Quick Install Guide
b Press down gently on the battery module until the bottom
clip snaps into place in the lower hole.
3 Insert the battery power connector into the power receptacle on
the BBU.
Note: The battery will drain if it is plugged in and
there is no power to the unit. If the system will not
be used right away, wait to do this step until the
system is ready for use.
Figure 29. Battery power connector inserted in power receptacle
The controller is now ready to install in your system.
Figure 23 shows the BBU fully installed on 3ware controllers.