Replacing The Battery - HP EliteDesk 800 G2 Desktop Mini Hardware Reference Manual

Replacing the battery

The battery that comes with the computer provides power to the real-time clock. When replacing the battery,
use a battery equivalent to the battery originally installed in the computer. The computer comes with a 3-volt
lithium coin cell battery.
WARNING!
burns if the battery is not handled properly. To reduce the risk of personal injury:
Do not attempt to recharge the battery.
Do not expose to temperatures higher than 60°C (140°F).
Do not disassemble, crush, puncture, short external contacts, or dispose of in fire or water.
Replace the battery only with the HP spare designated for this product.
CAUTION: Before replacing the battery, it is important to back up the computer CMOS settings. When the
battery is removed or replaced, the CMOS settings will be cleared.
Static electricity can damage the electronic components of the computer or optional equipment. Before
beginning these procedures, ensure that you are discharged of static electricity by briefly touching a
grounded metal object.
NOTE: The lifetime of the lithium battery can be extended by plugging the computer into a live AC wall
socket. The lithium battery is only used when the computer is NOT connected to AC power.
HP encourages customers to recycle used electronic hardware, HP original print cartridges, and rechargeable
batteries. For more information about recycling programs, go to http://www.hp.com/recycle.
1. Remove/disengage any security devices that prohibit opening the computer.
2. Remove all removable media, such as a USB flash drive, from the computer.
3. Turn off the computer properly through the operating system, then turn off any external devices.
4. Disconnect the AC power cord from the AC outlet and disconnect any external devices.
CAUTION:
the system is plugged into an active AC outlet. You must disconnect the AC power cord to avoid damage
to the internal components of the computer.
5. If the computer is on a stand, remove the computer from the stand and lay the computer down.
6. Remove the computer access panel.
7. Pull the blue tab (1) to disconnect the HDD power and data cable from the HDD.
WARNING!
to cool before touching.
8. Pull and hold the release lever next to the rear of the HDD outward (2).
The computer contains an internal lithium manganese dioxide battery. There is a risk of fire and
Regardless of the power-on state, voltage is always present on the system board as long as
To reduce risk of personal injury from hot surfaces, allow the internal system components
Replacing the battery 35