Two major airlines have introduced new restrictions on transporting portable headphones, including Apple AirPods, in checked luggage. This comes after multiple airlines, the TSA, and the entire country of Japan all expanded on existing bans around packing lithium batteries in their luggage. The lithium-ion battery that allows for portable charging also contains volatile electrolytes, which pose a particular risk of catching fire. Air New Zealand has changed its policy to include not only batteries and power banks, but also wireless headphones. Other airlines to introduce similar restrictions include Taiwanese regional carriers UNI Air and Tigerair. No U.S.-based airline currently has language specifically targeting portable headphones.