To Next Page

To Previous Page

RTC battery

The battery installed on the computer provides power to the real-time clock. When replacing the battery, use

a battery equivalent to the battery originally installed on the computer. The computer has a 3-volt lithium

coin cell battery installed.

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 (140ºF).

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 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. Prepare the computer for disassembly (Preparation for disassembly on page 23)

2. Remove the access panel (Access panel on page 24)

3. Locate the battery and battery holder on the system board.

NOTE: On some computer models, it may be necessary to remove an internal component to gain

access to the battery.

4. Depending on the type of battery holder on the system board, complete the following instructions to

replace the battery.

Type 1

a. Lift the battery out of its holder.

b. Slide the replacement battery into position, positive side up. The battery holder automatically

secures the battery in the proper position.

48 Chapter 4 Removal and replacement procedures: Microtower

Other manuals for HP ProDesk 490 G3 MT

Questions and Answers:

Need help?

Do you have a question about the HP ProDesk 490 G3 MT and is the answer not in the manual?

General