Owners Manual

Related references
Safety instructions on page 51
Related tasks
Removing the PCIe extender or storage controller card on page 104
After working inside your system on page 52
Installing a hard drive or SSD on page 89
Installing the hard drive or SSD backplane on page 100
Installing the hard drive or SSD cage on page 97
NVRAM backup 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
NOTE: 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 safety instructions section.
2. Follow the procedure listed in the Before working inside your system section.
3. Remove the following:
a. Hard drives or SSDs
b. Cooling shroud
c. Hard drive or SSD backplane
d. Hard drive or SSD cage
e. PCIe mezzanine card
f. NDC
g. IDSDM or rSPI card
h. System board
1. Locate the system battery on the system.
2. To remove the battery, press down firmly on the positive side of the connector and lift the battery out of the securing tabs
at the negative side of the connector.
3. To install a new system battery:
a. Support the battery connector by pressing down firmly on the positive side of the connector.
b. Hold the battery with the "+" facing up and slide it under the securing tabs at the positive side of the connector.
4. Press the battery straight down into the connector until it snaps into place.
Installing and removing sled components
107