Multiple recent incidents involving Delta Air Lines flights have been caused by battery fires, with the latest occurring on Flight 1334 from Atlanta to Fort Lauderdale. The FAA is investigating after a passenger's personal lithium-ion battery caught fire onboard, causing smoke in the cabin and prompting an emergency diversion to Fort Myers, Florida. Flight attendants quickly extinguished the fire using fireproof containment bags, and no injuries were reported. Delta expressed appreciation for the crew's prompt response and apologized for travel delays. This incident underscores a broader safety issue, as FAA data shows lithium battery fires on U.S. flights increased by 388% from 2015 to 2024, now nearly happening twice weekly, with 34 incidents reported this year alone. Airlines like Southwest have implemented stricter rules, requiring batteries and portable chargers to be used in plain sight and not stored in checked luggage, to prevent such fires. Experts emphasize the importance of keeping lithium-ion devices within reach during flights, as faulty or damaged batteries can cause intense fires that are difficult to extinguish, posing significant safety risks.