The following items cannot be included in checked baggage and are required to carry on if necessary: In addition, it shall not be held liable for any damage, loss or delay in delivery of such goods during transport. (laptop computers, cell phones, camcorders, cameras, MP3s, etc., expensive personal electronics, currency, jewelry, valuable metals, securities, other high-priced items, samples, documents, perishable items, etc.)
For lithium batteries, extra batteries that are not equipped with the device cannot be transported as checked baggage.
According to the Aviation Relation Act, dangerous items such as combustible/flammable, high-pressure gas containers, weapons and explosives may be restricted for checked baggage.