https://phys.org/news/2018-07-families-girls-sue-hoverboard-distributors.html > The lawsuit says that the importers and distributors of the hoverboard were negligent for continuing to market the device even though it posed a risk of overheating and igniting. The commission concluded a hoverboard caused the fire by exploding while it was being charged. > It also names the landlords of the home, saying it lacked working smoke detectors.