Asiana Airlines' 17 April 2026 notice, effective 20 April, restricts power banks to two units of 100Wh or less in the cabin. Power banks over 100Wh up to 160Wh require airline approval, with a maximum of two, while over 160Wh is prohibited. The allowance for power banks and spare batteries between 100Wh and 160Wh is two in total. Power banks cannot go in checked baggage. Using or charging power banks or e-cigarettes onboard is prohibited, and these items must not be stored in overhead bins; carry them with you or in the seat pocket. Protect each battery against shorts using an individual bag, insulating tape over terminals and USB ports, or a protective cap. Tell crew immediately if a device becomes swollen or overheated. Verify separate allowances for ordinary spare batteries and connecting airlines.