Failure to comply with these new safety standards could result in seizure of the products, and civil and criminal penalties. According to the CPSC's letter—which you can read here —hoverboards are said to cause "unreasonable risk of fire to consumers," due to the possibility of spontaneous combustion of its lithium-ion batteries. In the last three months, there were a reported 52 hoverboard fires that resulted in over $2 million in property damage, "including the destruction of two homes and an automobile." The agency added that it may look into a recall of all products in the future. This comes after almost every airline banned passengers from bringing hoverboards on board airplanes late last year. Ports in the U.K. began confiscating hoverboards over safety issues, and in January, Amazon (AMZN) offered to refund any purchases of hoverboards from its site.