Lithium Batteries In Checked Luggage. To reduce the risk of lithium battery fires the US. Lithium batteries not allowed in checked luggage.

I need to jump in here there are some dangerously wrong answers. Lithium ion batteries installed in a personal electronic device can be transported as checked or carry-on baggage. Lithium batteries not allowed in checked luggage.
Instead passengers will be required to take loose batteries with them in carry-on baggage packed in plastic bags.
In the cabin airline flight crews can better monitor conditions and have access to the batteries or device if a fire does occur. Lithium ion batteries installed in a personal electronic device can be transported as checked or carry-on baggage. To do this you can place each battery in original retail packaging separate plastic bags or protective pouches. Transportation Departments Pipeline and Hazardous Materials Safety Administration warned late last week.
