In light of Nikon’s announcements of a recall once again for lithium batteries that go back as far as 2012 it does not hurt to keep up to date with FAA regulations. Info on DPREVIEW
Batteries – These are FAA rules governing batteries on USA airlines from 2015. I do not believe too much has changed but it does not hurt to be reminded.
Source: Airline Passengers and batteries December 1 2015 – FAA_airline_passengers_and_batteries.pdf