If the battery is punctured, damaged, or exposed to high temperatures, the pressure can cause the battery to rupture or explode. When certain types of batteries are damaged or overheated, they can release toxic fumes. For example, alkaline batteries may emit potassium hydroxide, which is corrosive and harmful if inhaled or exposed to the skin.
Phones, eBikes, and anything else that has a rechargeable battery has a non-zero chance of bursting into flames. There’s a non-zero chance that the lithium battery in your device might, well, explode.
There’s a non-zero chance that the lithium battery in your device might, well, explode. Between 2012 and 2017, the U.S. Consumer Product Safety Commission estimates at least 25,000 fires involving these batteries—and this is still happening today. In 2023 alone, New York City reported 200 fires related to lithium-ion batteries.
If you notice one or more of these warning signs, it’s best to assume the battery is going to catch fire immediately and take steps to protect yourself. If you suspect one of your rechargeable batteries is going to explode, take the following steps immediately: If you see smoke or sparks, evacuate the area. Protect your hands.
Researchers have long known that high electric currents can lead to "thermal runaway" – a chain reaction that can cause a battery to overheat, catch fire, and explode. But without a reliable method to measure currents inside a resting battery, it has not been clear why some batteries go into thermal runaway, even when an EV is parked.
Smoke. White or gray smoke is a sign that the battery is going to explode very soon. If you see any kind of vapor coming from your device, it’s best to assume you’re about to see some fireworks. Sound. Batteries that are on their way towards pyrotechnics often make hissing or bubbling sounds.