Water will not extinguish a lithium-ion battery fire
Source: ViralHog
How to extinguish a lithium-ion battery fire
Despite their name, lithium-ion batteries used in electric bicycles and scooter products do not contain any actual lithium metal. Therefore, a Class D fire extinguisher is not to be used to fight a lithium-ion battery fire. Class D fire extinguishers, which contain dry powder, are intended for combustible metal fires only. Since lithium-ion batteries aren’t made with metallic lithium, a Class D dry powder extinguisher would not be effective.
So, what kind of fire extinguisher should you use in this scenario? Lithium-ion batteries are considered a Class B fire, so a standard ABC or BC dry chemical fire extinguisher should be used. Class B is the classification given to flammable liquids. Lithium-ion batteries contain liquid electrolytes that provide a conductive pathway, so the batteries receive a B fire classification.
For best results dowsing a Li-ion fire, use a foam extinguisher, CO2, ABC dry chemical, powdered graphite, copper powder or soda (sodium carbonate) should be used.