ok so this just happened yesterday and im still kind of annoyed about it. flying back from japan, had three 2s lipos in my carry on in a lipo bag clearly labeled everything, ive done this like a dozen times no issue. this time the agent pulls me aside and starts asking all these questions, calls over a supervisor, the whole thing. they eventually let me through but made me take out every single battery and show them individually and i nearly missed my connection

i had all my paperwork and the batteries were well within the wh limit but it didnt seem to matter, they just hadnt seen them before i guess. anyway lesson learned i guess, always get to the airport stupid early when youre carrying gear

ugh this is my biggest travel anxiety with drones honestly. i always carry printouts of the airline battery rules now specifically so i can just hand them to whoever is questioning me. has actually worked once lol. but yeah japan was fine for me outbound, coming back through narita they barely glanced at my bag

it really does just depend on who you get at the counter. same rules, same airport, different day and you get a completely different experience. i started putting my batteries in a clear zip lock inside the lipo bag so they can see everything without touching anything, seems to speed things up a bit. also labeling the wh directly on the battery with a sharpie helped one time