Service Reference Guide, d200 336493-004 6–23
Removal and Replacement Procedures— Microtower Type 2 Chassis
6.15 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.
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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.
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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.
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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 Troubleshooting
Guide for information on backing up the CMOS settings.
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Batteries, battery packs, and accumulators should not be disposed of together with the general
household waste. In order to forward them to recycling or proper disposal, please use the public
collection system or return them to HP, their authorized partners, or their agents.
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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 (Section 6.1, “Preparation for Disassembly”).
2. Remove the right access panel (Section 6.2, “Access Panel”).
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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. Depending on the type of battery holder on the system board, complete the following
instructions to replace the battery:
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