lithium-ion battery fire

How do you put out a lithium-ion battery fire?

Lithium-ion batteries have become essential to our daily lives, powering devices like smartphones, laptops, and electric vehicles. However, these batteries can pose a risk if they catch fire for various reasons. This article will discuss what causes lithium-ion battery fires, how to recognize the signs, safety precautions to prevent fires, and most importantly, how to put out a lithium-ion battery fire.

lithium-ion battery fire

What Causes a Lithium-Ion Battery Fire?

Understanding the causes of lithium-ion battery fires is crucial for prevention and response. The most common causes include the following:

Manufacturing defects: Sometimes, batteries may have internal defects, such as short circuits or contaminated materials, that can cause them to overheat and eventually catch fire.

Overcharging: Overcharging a lithium-ion battery can lead to excessive heat generation, resulting in thermal runaway and, ultimately, a fire.

External factors: Physical damage to the battery, exposure to high temperatures, or a faulty charging system can also lead to fires.

Recognizing the Signs of a Lithium-Ion Battery Fire

Knowing the warning signs of a lithium-ion battery fire can help you respond quickly and effectively. Some of the signs include:

  1. Swelling or bulging of the battery
  2. A strong, unusual odor
  3. Smoke or sparks coming from the battery
  4. Overheating during charging or use

How do you put out a lithium-ion battery fire?

Knowing how to respond if a lithium-ion battery fires can help minimize damage and risk. Here’s what you should do:

Use a Class D fire extinguisher: A Class D fire extinguisher is specifically designed for fires involving combustible metals, making it suitable for lithium-ion battery fires. Ensure you have one readily available and know how to use it.

Smothering the fire with sand or salt: Without a Class D fire extinguisher, you can use sand or salt to smother the fire. Pour a generous amount onto the flames, covering the entire battery.

Cooling the battery with water: Although not ideal, water can be used as a last resort to cool down the battery and prevent thermal runaway. Be cautious, as using water can cause a reaction with lithium and create toxic fumes.

Steps to put out a lithium-ion battery fire

1. Assess the Situation

Before putting out a lithium-ion battery fire, assess the situation to determine the appropriate action. If the fire is small and localized, you may be able to extinguish it safely. However, if the fire has spread to other parts of the device or area, evacuating the premises may be best and calling emergency services immediately.

2. Disconnect Power and Remove Nearby Flammable Materials

To minimize the risk of the fire spreading or escalating, disconnect any power sources connected to the lithium-ion battery device, if it is safe. Additionally, remove any flammable materials from the vicinity of the fire to prevent further ignition.

3. Use an Appropriate Fire Extinguisher

When dealing with a lithium-ion battery fire, using a fire extinguisher suitable for Class D fires involving combustible metals is essential. These extinguishers contain a dry powder extinguishing agent that effectively smothers and cools the fire. Avoid using water or traditional fire extinguishers, as they can exacerbate the situation by causing electrical short-circuits or reacting with lithium burning.

4. Approach the Fire with Caution

Approach the fire cautiously, ensuring you maintain a safe distance and clear the escape route. Follow the instructions on the fire extinguisher for appropriate utilization, pointing the extinguisher canister at the base of the fire and using a spreading motion to encompass the complete area impacted by the fire.

5. Monitor the Situation After Extinguishing the Fire

Once the fire has been extinguished, monitor the situation, as lithium-ion battery fires can re-ignite if not adequately cooled. Move the affected device or battery to a well-ventilated, non-flammable surface and allow it to cool for several hours.

How to prevent lithium battery fire?

Prevention is always better than cure. Here are some safety precautions to help you minimize the risk of lithium-ion battery fires:

Use Genuine and Approved Batteries and Chargers: Only use batteries and chargers from reputable manufacturers and ensure they are compatible with your device. Counterfeit or incompatible components can increase the risk of fires due to poor quality control and design.

Avoid Overcharging: Do not leave your devices connected to the charger for extended periods, as overcharging can cause the battery to overheat and potentially lead to a fire.

Inspect Your Batteries Regularly: Check your batteries for signs of damage, swelling, or leakage. If you notice any abnormalities, stop using the battery immediately and dispose of it properly.

Store Batteries Safely: Store lithium-ion batteries in a cool, dry place, away from direct sunlight and flammable materials. If you need to store a battery for an extended period, ensure it is partially charged (around 50%) to maintain its lifespan and reduce the fire risk.

Avoiding extreme temperatures: Keep devices and batteries away from direct sunlight or extreme cold as extreme temperatures can affect battery performance and increase fire risk.

Handle Batteries with Care: Avoid puncturing, crushing, or bending lithium-ion batteries, as these actions can compromise their structural integrity and lead to a fire.

Follow Manufacturer Guidelines: Always follow the manufacturer’s guidelines for the proper use, storage, and disposal of lithium-ion batteries.

What NOT to Do When Facing a Lithium-Ion Battery Fire

  1. Do not use a regular fire extinguisher or water to extinguish the flames; it may cause a more intense reaction.
  2. Do not attempt to move the burning device or battery, as it can cause further damage or injury.
  3. Proper Disposal of Damaged Lithium-Ion BatteriesAfter a battery fire, it’s essential to dispose of the damaged battery correctly. Contact your local hazardous waste facility or recycling center for guidance on safely discarding the damaged battery.


Lithium-ion battery fires can be dangerous, but with proper knowledge and precautions, you can minimize the associated risks. Always follow safety guidelines for charging, storing, and using your devices with lithium-ion batteries. If a fire does occur, remember to use a Class D fire extinguisher or sand/salt to put out the flames, and dispose of the damaged battery properly.


  1. Can you use a regular fire extinguisher for a lithium-ion battery fire?

No, you should use a Class D fire extinguisher specifically designed for fires involving combustible metals, such as lithium-ion batteries.

  1. How can I tell if my lithium-ion battery is damaged or at risk of catching fire?

Signs of a damaged or at-risk battery include swelling, an unusual odor, smoke, sparks, or overheating during charging or use.

  1. Is it safe to use water to extinguish a lithium-ion battery fire?

Use water as a last resort since it can react with lithium and produce toxic fumes. Instead, choose a better choice like a Class D fire extinguisher, sand, or salt.

  1. How should I store my lithium-ion batteries to minimize the risk of a fire?

Keep batteries in a cool and dry location, away from combustible materials and extreme temperatures, and consider using a fire-resistant receptacle for additional safety.

  1. What should I do if my device with a lithium-ion battery starts to overheat?

Immediately switch off the device and remove it from the charger, if appropriate. Allow the device to cool down before attempting to use it again. If the problem persists, consult the manufacturer or a professional technician.