Lithium-ion batteries in personal electronic devices (PEDs) such as laptops, smartphones, powerbanks and electronic cigarettes can pose a serious safety risk in air travel. Damaged or overheated batteries can combust or ex-plode. In the LOKI-PED project, the Fraunhofer Institute for High-Speed Dynamics, Ernst-Mach-Institut, EMI and the Fraunhofer Institute for Building Physics IBP cooperated with Airbus to examine the consequences of smoke and fire occurring in aircraft cabins and cockpits. This first scientifically substantiated risk assessment will contribute to a safer use of electronic devices in air travel.