NO
Ive dont it several times recently. You can check or carry it on. The size of
Lithium battery is not an issue and it is installed, which is the key. The whole issues is non installed lithium
batteries
What I've done:
Print out the airline hazmat poilicy on batteries ( they are all the same and found in FAQ's- they follow the IATA regs)
Look up the manufacture web page or call them and ask for the MSDS for the
EPIRB. I carried it just to prove the type of device and size of
battery
Never been questioned or hasseled.
What
EPIRB, I may have the MSDS
BK