What is the warning regarding the lithium coin cell battery in this computer?

There is a risk of fire and chemical burn if the battery is handled improperly. Do not disassemble, crush, puncture, short external contacts, dispose in water or fire, or expose it to temperatures higher than 140°F (60°C), and do not attempt to recharge the battery. Batteries should not be disposed of with general household waste; use the public collection system or return them to HP or their authorized partners for recycling. (Page 15)