Hoverboards have seen a recent uptick in popularity, especially as a holiday gift for the techies in your life. But airline authorities are warning about packing them onto a flight this holiday season, and some carriers have even banned them outright.
Federal safety regulators have also stepped up an investigation of the hoverboards following reports of fires and explosions. The Consumer Product Safety Commission told NBC News it received "at least 10" reports of hoverboard fires and that that number is increasing daily.
Hoverboards are powered by lithium-ion and lithium-metal batteries. If metal objects such as keys, coins, tools or other batteries come in contact with both ends of these batteries, it can create an electrical current which can cause extreme heat and sparks and even start a fire.
Concerns about the batteries' safety on planes have increased. By the end of June of this year, 158 incidents "involving batteries carried as cargo or baggage" (several of which involved burning and smoke) had been recorded by the Federal Aviation Administration since March 1991.
The FAA only permits spare, uninstalled lithium-ion and lithium-metal batteries in carry-on baggage. Lithium-metal batteries are limited to 2 grams of lithium per battery and lithium-ion batteries are limited to a rating of 100 watt hours per battery, a threshold the agency said should allow for nearly all types of electronic devices used by the average person.