Onboard Battery - Cisco UCS C890 M5 Instruction Manual

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4.3.9

Onboard Battery

The system uses non-volatile memory to retain system information when system
power is removed. This memory is powered by a lithium battery on the PCH board. In
addition, the system also uses a super charged capacitor.
4.3.9.1
Replacing the Battery
1.
Begin by removing power from the system.
2.
Rotate the black thumb screw counterclockwise in order to pull out the lever.
3.
Use the lever to pull the PCH module out of the chassis.
4.
Push aside the small clamp that covers the edge of the battery. When the battery
is released, lift it out of the holder.
5.
To insert a new battery, slide one edge under the lip of the holder with the
positive (+) side facing up. Then push the other side down until the clamp snaps
over it.
6.
Insert the PCH module back to the chassis and fully close the lever before locking
it by rotating the red, black thumb screw clockwise.
Note: Handle used batteries carefully. Do not damage the battery in any way; a
damaged battery may release hazardous materials into the environment. Do not
discard a used battery in the garbage or a public landfill. Comply with the regulations
set up by your local hazardous waste management agency to dispose of your used
battery properly.
Warning: There is a danger of explosion if the onboard battery is installed upside down
(which reverses its polarities). The battery must be replaced only with the same or an
equivalent type recommended by the manufacturer (CR2032).
LITHIUM BATTERY
BATTERY HOLDER
Installing the Onboard Battery
Page 65

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