Lithium batteries are dangerous goods, much like gasoline, propane, and sulfuric acid. Lithium batteries are used in many electronic devices such as cameras, cell phones, laptops and tablets, electronic cigarettes (e-cigarettes) and other personal vaporizers, drones, medical equipment and power tools.
When carried by passengers for personal use, lithium batteries must be carried in carry-on baggage only.
While most lithium batteries are safe, some have overheated and caught fire. These fires are difficult to put out and produce toxic and irritating fumes.