Lithium batteries are considered hazardous materials when shipped by air. Notify Shipping for any shipments that include lithium batteries.
Lithium batteries are not regulated during self-transportation.
Note: If you need to fly with lithium batteries, please note that since 2008, it is illegal to pack spare lithium batteries in your checked baggage. You may pack spare lithium batteries in your carry-on baggage.
Read more about traveling with lithium batteries from the FAA’s webpage on Pack Safe: Lithium ion and lithium metal batteries, spare (uninstalled)