HP Smart Array P600-Controller - Manual (Page 18)

Upgrading or replacing controller options 18
b. Lift the battery pack off the cache board (2).
4. Remove the secondary cache battery pack:
a. Unhook the wire retainer that holds the battery pack to the controller board (1).
b. While holding the battery in one hand, pull the plastic retainer tabs up and push them through to
the other side of the controller board (2).
5. Replace whichever battery is degraded.
6. Reinstall the batteries on the cache board and the controller board.
7. Reinstall the cache board and its battery on the controller.