HP Compaq Presario,Presario 5116 Quick Start Manual page 157

This computer may contain a
lithium-ion or nickel-metal-
hydride battery pack. There
is a risk of fire and chemical
burn if the battery pack is
handled improperly. Do not
disassemble, crunch,
puncture, or short external
contacts, dispose of in water
or fire, or expose to
temperatures higher than
140°F (60°C).
For information about real-time clock battery replacement,
contact your Compaq Authorized Dealer, reseller, or service
provider.
Caution: Do not dispose of batteries with general household waste.
To dispose of them or recycle them, use the public collection system
in accordance with local regulations or return them to Compaq, an
authorized Compaq Partner, or the point-of-sale.
Your computer is provided with a battery-powered, real-time clock
circuit. Danger of explosion and risk of personal injury exists if the
battery is incorrectly replaced or mistreated. Do not attempt to
recharge the battery, disassemble it, remove it, immerse it in water, or
dispose of it in fire.
Only authorized technicians trained by Compaq should attempt to
repair this equipment. All troubleshooting and repair procedures are
detailed to allow only subassembly/module-level repair. Because of the
complexity of the individual boards and subassemblies, no one should
attempt to make repairs at the component level or to make
modifications to any printed wiring board. Improper repairs can create
a safety hazard.