Rtc Battery - HP 280 G4 Maintenance And Service Manual

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 V
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 (140ºF).
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:
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, make sure 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. Prepare the computer for disassembly
2. Remove the access panel
3. Remove the optical drive
4. Remove the front bezel
5. Remove the drive cage
6. To release the battery from its holder, squeeze the metal clamp that extends above one edge of the
battery (1). When the battery pops up, lift it out (2).
7. Slide the replacement battery into position, positive side up. The battery holder automatically secures
the battery in the proper position.
To install the RTC battery, reverse the removal procedures.
The computer contains an internal lithium manganese dioxide battery. There is a risk of fire and
Before replacing the battery, back up the computer CMOS settings. When the battery is
(Access panel on page
(Optical drive on page
(Front bezel on page
(Hard drive on page
(Preparation for disassembly on page
18).
22).
26).
24).
16).
RTC battery 31