Lithium-ion batteries are all but an inevitability in modern homes. From smartphones and laptops to electric vehicles, these batteries are popping up in more and more devices, and it is important to understand the unique risks presented by these power sources.

Electric vehicles have become a popular choice for many in recent years, and while data shows these lithium-ion-powered rides aren’t necessarily at higher risk of fire than their fuel-powered counterparts, the type of fire risk presented is unique.

Lithium-ion fires involve thermal runaway — a chemical process that occurs when a battery cell is abused or damaged (like by heat, crushing, penetration or overcharge) that generates heat as well as toxic and flammable gases. The heat speeds up these reactions, producing more heat and gases. When the heat builds up to the point where it can no longer be dissipated to the cell’s surroundings it begins to affect nearby battery cells.