Electronic Flight Bags With Lithium Battery Installations
These problems experienced by users of lithium batteries raise concern about the use of these batteries in commercial aviation. Accordingly, the proposed use of lithium batteries in Astronautics electronic flight bags on Airbus A318, A319, A320, and A321 series airplanes has prompted the FAA to review the adequacy of existing regulations in Title 14 Code of Federal Regulations (14 CFR) part 25. Our review indicates that the existing regulations do not adequately address several failure, operational, and maintenance characteristics of lithium batteries that could affect the safety and reliability of lithium battery installations.
https://www.federalregister.gov/arti...nic-flight#h-9