If I'm reading
this website correctly, you had better get used to carrying all your camcorder batteries in your carry-on luggage. Detached lithium-based batteries will no longer be allowed in checked luggage.
I'm still confused by the 8-gram and 25-gram limits. Does this mean that I can't bring multiple batteries for my FX-1 with me on my next overseas trip???
EDIT:
The big 970-series batteries for my FX-1 are about 50 W-hrs. So in theory that means I can take, IN CARRY-ON luggage, any number of those. But I'd be limited to two of the large battery units shown on that web page.