I think they're incorrect, but one would have to read all the regulations carefully to be sure. I'm basing that judgement on this: https://www.icao.int/safety/

I think they're incorrect, but one would have to read all the regulations carefully to be sure. I'm basing that judgement on this: https://www.icao.int/safety/DangerousGoods/Documents/Guidance%20Material/ICAOLithiumBatteryGuidance.pdf https://www.icao.int/safety/DangerousGoods/Documents/Guidanc... Part 2E makes a battery handling label exception for button cells, quote: "except that button cells installed in equipment (including circuit boards) need not be considered." While this is packaging guidance, and not airline guidance, I expect it's the same rule, for the same reason.