Best Ways to Prevent Lithium-Ion Battery Fires During Fire Prevention Month

Power banks, rechargeable flashlights, emergency radios and other portable devices make everyday life and emergency preparedness easier. But the batteries inside them need to be used, charged and stored correctly. Understanding lithium ion battery safety can help reduce avoidable risks at home, while travelling or when storing emergency equipment.

That makes battery safety especially relevant during Fire Prevention Month 2026. The goal is not to stop using rechargeable gear, but to understand lithium battery fire risk, recognize warning signs early and follow safer charging and storage habits.

Why Lithium-Ion Battery Safety Matters in 2026

The National Fire Protection Association's 2026 Fire Prevention Week materials specifically focus on safe charging of devices powered by lithium-ion batteries. The campaign reflects the growing number of rechargeable products used in homes every day.

Recent product-safety actions also show why power bank safety deserves attention. On September 24, 2026, the U.S. Consumer Product Safety Commission announced a recall involving about 21,380 NEWDERY power banks because their batteries could ignite or explode. Another September recall involved about 32,400 magnetic wireless power banks that could overheat and ignite.

These incidents do not mean every rechargeable product is dangerous. They reinforce the importance of good lithium ion battery fire safety practices and checking whether equipment has been recalled.

Can Power Banks Catch Fire?

Yes, power banks can catch fire if a battery is defective, physically damaged, exposed to excessive heat or experiences an internal failure. Problems can also develop as batteries age through repeated charge and discharge cycles.

If you are wondering what causes lithium batteries to catch fire, one important mechanism is thermal runaway. This is an uncontrolled chain reaction in which a battery generates increasing heat, potentially releasing flammable gases and leading to fire or explosion.

So, why do power banks catch fire in some cases? There is rarely one universal cause. Manufacturing defects, physical damage, excessive temperatures, inappropriate charging equipment and deterioration can all contribute depending on the device and circumstances.

Why Is My Power Bank Heating Up When I Charge It?

Some warmth during charging can occur, but a power bank gets hot while charging should become a concern when the heat is excessive, unusual for that device or accompanied by other warning signs.

Persistent power bank overheating should not be ignored. Stop charging the device and follow the manufacturer's guidance if it becomes noticeably hotter than normal, changes shape, leaks or produces an unusual smell or sound.

The same principle applies to lithium ion battery overheating in flashlights, radios and other rechargeable equipment. The U.S. Fire Administration recommends stopping use when a lithium-ion battery shows excessive heat, odor, shape changes, leaking or unusual noises.

Can You Safely Leave a Power Bank Charging Overnight? 

People frequently ask, is it safe to charge a power bank overnight? The safer approach is to charge rechargeable equipment while you are awake and able to notice unusual heat, swelling, smoke, odor or other problems.

If you are asking, can I leave my power bank charging overnight, follow the device manufacturer's charging instructions rather than assuming every charger and battery behaves the same way. USFA guidance recommends following charging guidelines and avoiding leaving lithium-ion batteries charging for excessively long periods.

What’s the Most Effective Way to Recharge a Power Bank? 

The best way to charge a power bank is to follow the manufacturer's instructions and use the charger supplied with the device or an appropriate charger recommended for it.

Good lithium ion battery charging safety habits include:

• Use manufacturer-recommended or compatible charging equipment.
  
• Inspect cables and connectors for visible damage.
  
• Avoid overloading electrical outlets.
  
• Keep the device in a cool place and avoid exposing it to direct sunlight. 
  
• Charge where you can notice overheating or other warning signs.
  
• Do not charge equipment where it blocks an exit.
  
• Stop charging immediately if the device starts feeling excessively hot. 

USFA also recommends using the charger provided by the manufacturer and warns against overloaded outlets and unsuitable multi-plug arrangements.

Why Is My Power Bank Swollen?

A swollen power bank indicates that something has changed inside the battery. Swelling should be treated as a warning sign rather than something to press back into shape or continue using normally.

If you're wondering why is my power bank swollen, aging, internal damage or battery deterioration may be involved. The exact cause cannot be safely diagnosed just by looking at the outside of the device.

A swollen lithium ion battery should not be punctured, crushed, bent or opened. USFA lists bulging among the signs associated with battery damage or possible thermal runaway.

Can I Use a Swollen Power Bank?

No. If you're asking can I use a swollen power bank, discontinue normal use and charging. Do not attempt a DIY repair or deliberately discharge it by damaging the battery.

For what to do with a swollen power bank, keep people away from the damaged device, follow the manufacturer's instructions and contact an appropriate local battery or hazardous-waste facility for handling guidance.

What Are the Warning Signs of a Failing Lithium-Ion Battery?

Watch for changes that are different from the device's normal operation:

• Bulging or swelling
  
• Excessive or rapidly increasing heat
  
• Cracks or physical damage
  
• Leaking
  
• Unusual odor
  
• Popping or hissing sounds
  
• Visible smoke or gases
  
• Changes in shape or color

These signs can indicate battery damage or the beginning of a more serious problem. USFA specifically identifies bulging, rising temperature, mechanical damage, hissing and visible gases as warning indicators.

If a battery begins smoking, venting gases, hissing or showing signs of fire, move away, evacuate the immediate area and contact emergency services rather than trying to handle the battery yourself.

What Is Thermal Runaway in a Lithium-Ion Battery?

Thermal runaway in a lithium ion battery is a self-sustaining heating process. Once internal temperatures rise beyond safe conditions, chemical reactions can generate still more heat, potentially causing gases, fire or explosion.

Physical damage, electrical problems and extreme heat can contribute to conditions that destabilize a battery. This is why damaged or rapidly heating rechargeable equipment should never be treated as a minor cosmetic problem.

How to Store Lithium-Ion Batteries Safely

Knowing how to store lithium ion batteries safely matters for emergency gear that may sit unused for weeks or months. Keep equipment in a cool, dry location and protect batteries from crushing, punctures and excessive temperatures.

Good lithium battery storage safety also means keeping spare batteries away from materials that can easily burn. USFA advises against storing lithium-ion batteries in direct sunlight or hot vehicles.

For longer-term power bank storage, periodically inspect the device for swelling, cracks, leaking or other changes and follow the manufacturer's instructions for storage and maintenance.

How Can You Safely Get Rid of an Old Power Bank? 

Proper lithium ion battery disposal is important because discarded batteries can still contain enough stored energy to start fires if damaged or short-circuited.

If you're searching how to dispose of a power bank, do not automatically place it in household trash or curbside recycling. The U.S. EPA recommends taking lithium-ion batteries to dedicated battery collection sites or household hazardous-waste facilities.

For damaged lithium battery disposal, contact the manufacturer or your local hazardous-waste authority for specific instructions. Damaged or swollen batteries may require additional precautions.

People asking where to recycle power banks should check participating electronics retailers, battery collection programs or local household hazardous-waste facilities. Requirements can differ by state and municipality.

For how to dispose of swollen power bank batteries, avoid crushing, puncturing or casually transporting a visibly damaged unit. Obtain instructions from the manufacturer or local collection facility before handling it further.

Power Bank and Rechargeable Gear Safety Checklist

Before charging or storing rechargeable emergency gear:

• Inspect the battery and casing for damage.
  
• Use appropriate charging equipment.
  
• Stop using batteries that swell or leak.
  
• Watch for any unexpected heat, strange odours, or unusual noises. 
  
• Keep batteries away from excessive heat.
  
• Protect stored equipment from crushing and punctures.
  
• Check CPSC recall information for products you own.
  
• Do not put lithium-ion batteries in household trash or curbside recycling.
  
• Use an approved local battery or hazardous-waste collection service.

These habits apply not only to power banks but also to rechargeable flashlights, radios and other portable emergency equipment.

Frequently Asked Questions

Can a power bank catch fire when it is not charging?

It is possible. A damaged or defective battery can remain hazardous even when disconnected from a charger. Physical damage, excessive heat or an internal fault can create problems, so stop using equipment that is swollen, leaking, unusually hot or visibly damaged.

Is it normal for a power bank to get warm while charging?

A small amount of warmth may occur during operation, but excessive or rapidly increasing heat is a warning sign. If a device becomes noticeably hotter than usual, disconnect it when safe to do so and follow the manufacturer's instructions.

Can I Charge My Power Bank With Any Charger? 

Do not assume every charger is appropriate. Check the manufacturer's voltage, current, connector and charging recommendations. USFA recommends using the charger supplied by the manufacturer or appropriate equipment from a reputable source.

How long should I keep a power bank before replacing it?

There is no single replacement age for every power bank. Battery chemistry, charging cycles, temperatures, storage and product quality affect lifespan. Replace or stop using a device earlier if you notice swelling, cracking, abnormal heat, leaking or other deterioration.

How should lithium-ion batteries be prepared for recycling?

EPA recommends protecting exposed battery terminals with non-conductive tape or placing individual batteries in separate plastic bags before taking them to an appropriate collection facility. Never place them in ordinary household recycling.

What should I do if a rechargeable device starts smoking or hissing?

Move away from the device, get others to a safe location and contact emergency services. Do not pick up, puncture or attempt to dismantle a battery showing signs of thermal runaway or fire.

Final Takeaway

Rechargeable gear is valuable for everyday use, camping and emergency preparedness, but safe ownership goes beyond simply plugging a device into a charger. Choose suitable equipment, follow manufacturer instructions, watch for abnormal heat or swelling, store batteries carefully and recycle them correctly.

Fire Prevention Month is a useful reminder to inspect the rechargeable equipment you already depend on—and replace or safely retire anything showing signs of damage before an emergency makes that gear essential.