02/06/2026
Many portable devices today are powered by rechargeable lithium-ion batteries. These types of batteries pose a higher risk of fire than others.
Lithium-ion batteries are popular because they are light-weight and long lasting compared to other rechargeable batteries.
You will find them in many devices such as phones, tablets, power banks, laptop computers, toys, appliances and tools, as well as mobility equipment such as e-bikes and e-scooters. They can also be found in many other modern devices that need power.
So what causes lithium-ion batteries to catch fire?
Lithium-ion batteries release toxic and flammable gases when they short circuit, which may lead to them catching fire. If the battery is fully charged, violent fire behaviour with sparks and jet-like flames may be experienced.
The main reasons lithium-ion batteries short circuit and catch fire - a process called thermal runaway - are because they:
Are incorrectly charged using a charging cable that was not designed for the device or battery. This can result in overcharging or overheating.
Have been damaged by an impact, cracked, dented, punctured, crushed or exposed to overheating.
Have been in fresh or salt water for a long time, causing corrosion within the battery.
It is therefore very important that you dispose of old or damaged lithium-ion batteries correctly.
