Thom Hogan skriver i Complete Guide to the Nikon D300 (side 85)
"Note: In the US, the Departement of Transportation (DOT) no longer
allows batteries like the EN_EL3e to be packed in your checked luggage
(unless it is inside a camera in your luggage; it can't be in your
luggage outside of the divice it powers). You need to carry extra
EN_EL3e batteries with you in your carry-on luggage instead of your
checked luggage. The reason for this has to do with fires. The
extingusshers in the carog area of passenger planes do not work on
fires that have lithium fueling them while the extinguishers in the
passenger cabin do work on lithium fires."
Have a nice trip!!
mvh
sk