NEC DAC Battery N8103-102 - Manual (Page 56)

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3. Battery Pack Replacement Procedure
Replace the battery pack in the following procedure:
1. Exit from all applications and shutdown OS.
2. Turn off the power of the server and remove all the power cords connected to the
power unit from the receptacles.
3. Remove the side cover following the User’s Guide of the server.
4. Remove all the cables from the disk array controller and the server.
5. Remove the screw fixing the BBU and the disk array controller. Then remove the
BBU and the disk array controller from the server.
6. Remove the battery cable, which connect the BBU with the disk array controller,
from the disk array controller.
7. On the rear face of the BBU, remove the screws (4) fixing he battery case.