Over the past several years, lithium-ion batteries have become increasingly common. Most people are now familiar with the fire risks associated with the batteries used in e-bikes and scooters, devices that have tragically contributed to 34 fire related deaths in New York City since 2021, as of the date of publication. But, the presence of lithium-ion batteries goes far beyond micromobility. They're found in everything from electric vehicles to large grid-scale energy storage systems, some of which are being installed in urban environments within the five boroughs. In this episode, Battalion Chief Jason Cascone hosts a comprehensive discussion with FDNY Chief of Safety James Canty, and Hazmat Battalion Chiefs Ray Coyle and Matt Quinn about why lithium-ion batteries can be volatile, how to safely operate at fires involving them, and mitigating them on the fireground.