eelnoraa
Contributor
For the past 2 years, every time I flight from SFO to an international destination, usually via Cathey pacific or United, they will always ask me if I have Li-on battery in check in package. If yes, I will have to take it out and put them into hand carry. So no, Li-On is NOT supposed to be check in. There is some limitation for hand carry as well, but I haven't has issue, so didn't ask the rule.