This informational video was developed to support aircraft crew training for the safe handling of lithium batteries in portable electronic devices (PEDs) undergoing a failure condition known as thermal runaway. Lithium batteries, which power most PEDs such as phones, laptops, tablets, and watches are brought onboard aircraft by passengers and crew in increasing numbers - there are an estimated 2.3 billion lithium battery powered devices brought into aircraft passenger cabin annually. While excellent sources of power, under failure conditions these batteries can result in dangerous fires and their increased usage has led to a higher prevalence of inflight incidents. This video was developed to provide information for developing procedures to most effectively mitigate thermal runaway events in the aircraft environment.