System Battery; Replacing The Nvram Backup Battery - Dell PowerEdge M830 Owner's Manual

System battery

The NVRAM backup battery installed in your system helps to retain the BIOS settings and configurations
even if the power is switched off.

Replacing the NVRAM backup battery

Prerequisites
WARNING: There is a danger of a new battery exploding if it is incorrectly installed. Replace the
battery only with the same or equivalent type recommended by the manufacturer. Discard used
batteries according to the manufacturer's instructions. See the safety instructions that came with
your system for additional information.
CAUTION: Many repairs may only be done by a certified service technician. You should only
perform troubleshooting and simple repairs as authorized in your product documentation, or as
directed by the online or telephone service and support team. Damage due to servicing that is
not authorized by Dell is not covered by your warranty. Read and follow the safety instructions
that are shipped with your product.
1. Follow the safety guidelines listed in the Safety instructions section.
2. Follow the procedure listed in the Before working inside your system section.
3. Remove the following:
a. system cover
b. hard drives or SSDs
c. hard-drive backplane or SSD backplane
d. hard-drive cage or SSD cage
4. If installed, remove the memory module.
Steps
1. Locate the system battery on the system.
2. Hold the battery and pull it toward the positive side of the battery until the battery disengages from
the connector.
3. Lift the battery away from the system.
137