'Safest method' to pack common item most airlines 'ban' from suitcases
Summary
To avoid flight delays, denied boarding, or emergency landings, travelers must pack lithium-ion battery devices, such as vapes and power banks, in their cabin/hand baggage rather than checked luggage. This is due to the significant fire risk these items pose if they overheat or become damaged in the plane's hold.
Major airlines like EasyJet, Ryanair, TUI, Jet2, and Virgin Atlantic have strict regulations. Most allow a limited number of power banks per person with specific wattage limits (typically up to 160Wh, though Ryanair caps at 100Wh). For vapes, all mentioned airlines strictly prohibit them in checked luggage and forbid use or charging during the flight. Specific storage rules vary, such as Jet2 and Ryanair requiring devices to be stowed under the seat rather than in overhead bins.
(Source:getreading.co.uk)