The ever growing prevalence of lithium-ion batteries across a wide range of products is increasing the risk of fire losses to vessels and cargoes. Batteries have been identified as the cause of a recent spate of scrap fires on vessels leading to major casualties. The problem stems from hazardous materials, particularly batteries, being present in supposedly inert scrap cargoes due to improper disposal in household waste streams. These batteries can spontaneously ignite or cause fires during handling and transportation, leading to intense, difficult-to-extinguish blazes that endanger ships and crews. Insurers and safety organisations are issuing warnings and recommending better screening and handling procedures for scrap metal cargoes. Incidents of battery fires on mega yachts are also on the rise. Mega yachts use an increasing number of lithium-ion batteries to power their advanced electronics, luxury amenities, and growing fleet of electric tenders and water toys. Incorrect use and maintenance coupled with insufficient crew training can lead to significant losses.