HP ProOne 400 G4 20-inch Non-Touch All-in-One Business PC User Manual download pdf (Page 32)

Replacing the RTC 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! The computer contains an internal lithium manganese dioxide battery. There is a risk of re and

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 re 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 briey touching a

grounded metal object.

NOTE: The lifetime of the lithium battery can be extended by plugging the computer into a live AC outlet.

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.

To locate the battery on the system board, see Locating internal components on page 23.

1. To release the battery, disconnect the battery cable (1), and then lift the battery from the computer (2).

2. To insert the new battery, connect the battery cable (1), and then press the battery into the computer

(2).

3. Turn on the computer.

4. Reset the date and time, your passwords, and any special system setups using Computer Setup.

26 Chapter 3 Hardware repair and upgrade

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HP ProOne 400 G4 20-inch Non-Touch All-in-One Business PC User Manual Page 32