China Southern Airlines - Power banks can be handy when traveling. But to ensure the safety on board of Chinese Airlines the Chinese Aviation authority (CAAC) has imposed some rules; - Power
Can I carry a MI 30,000 mAh power bank on a Lufthansa flight? - Aviation Explained - Quora
When flying, are you allowed to bring external battery packs / power banks? - Power Bank - Quora
Can I carry power banks while traveling by plane? - Digital Citizen