https://www.finnair.com/ru-en/frequently-asked-questions/baggage/can-i-bring-batteries-or-power-banks-with-me-to-the-airplane--1940356
spare batteriespower banksbring
https://www.cathaypacific.com/cx/en_AU/baggage/controlled-and-banned-items/lithium-batteries.html
Pack your commercial or spare batteries in the safest way possible with our regulations and tips.
spare batteriesbaggage information