Replacing The Battery - HP EliteDesk 705 G4 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.
IMPORTANT:
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, and turn off any external devices.
4. Disconnect the power cord from the AC outlet and disconnect any external devices.
IMPORTANT:
as the system is plugged into an active AC outlet. To prevent damage to internal components, you must
disconnect the power cord from the power source before opening 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.
For instructions, see
7. To access the battery, you must remove the hard drive cage or the graphics processor, depending on
your model.
For models with a hard drive:
a. Rotate the hard drive latch up (1) to disengage the hard drive from the cage. Slide the drive toward
the rear of the chassis until it stops, and then lift the hard drive up and out of the cage (2).
38 Chapter 3 Hardware upgrades
The computer contains an internal lithium manganese dioxide battery. There is a risk of fire and
Before replacing the battery, it is important to back up the computer CMOS settings. When the
Regardless of the power-on state, voltage is always present on the system board as long
Removing the computer access panel on page 9.