Lithium-ion battery fire is characterized by fast ignition speed, long duration, high combustion temperature, difficult to extinguish, and explosion after long-term spontaneous combustion. Water-based fire extinguishers are generally green, and the main components are foam extinguishing agent formed by water and water. Water-based fire extinguishers are sprayed in the form of water mist, and the extinguishing agent can quickly form a water film on the surface of combustible materials to isolate oxygen, thus achieving the purpose of rapid fire extinguishing. However, for lithium battery fires, water-based fire extinguishers can only cool down. At the same time, use a lot of water to put out the fire, and call the police for help as soon as possible when you find the fire. It should be noted that dry powder fire extinguishers are not suitable for extinguishing lithium battery fires. Because the dry powder fire extinguisher can quickly extinguish the open flame, but it can't reduce the temperature inside the lithium battery. Even if the external open flame goes out, the temperature inside the lithium battery is still very high, and the internal chemical reaction continues, which may lead to the battery rekindling and even explosion.