Battery
The battery that comes with your computer provides power to the real-time clock and has a lifetime of
about three years. When replacing the battery, use a battery equivalent to the battery originally installed
on the computer. The computer comes with a 3-volt lithium coin cell battery.
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.
WARNING! This computer contains an internal lithium manganese dioxide battery. There is a risk of
fire 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 140°F (60°C).
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. Refer to the Computer Setup
(F10) Utility Guide for information on backing up the CMOS settings.
NOTE: 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.
CAUTION: 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.
1. Prepare the computer for disassembly (Preparation for Disassembly on page 87).
2. Remove the computer access panel (
Access Panel on page 88).
NOTE: It may be necessary to remove an expansion card to gain access to the battery.
3. Locate the battery and battery holder on the system board.
4. Carefully pull the cable bundle out of the way to access the battery.
5. Depending on the type of battery holder on your system board, complete the following instructions
to replace the battery:
Battery 115
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