(credit: Ben Larcey)

On Friday, three major US airlines’ ban against so-called “hoverboards” goes into effect.

American, United, and Delta banned the devices on Thursday out of concern that their lithium ion batteries could be a fire hazard on a flight. According to the Los Angeles Times, British Airways will also reject the self-balancing devices.

In a statement, Delta said that it had “reviewed hoverboard product specifications and found that manufacturers do not consistently provide detail about the size or power of their lithium-ion batteries. This investigation revealed devices often contain battery varieties above the government mandated 160 watt hour limit permitted aboard aircraft.”