Blowing Up Hoverboards on Purpose
Northbrook, Ill. — The sign on the reinforced door read “Projectile Testing” and the crowd gathered in the corridor outside had been warned to expect a small explosion. But when the hoverboard battery blew up with an almighty BANG and a flash of yellow flame, Barbara Guthrie flinched all the same. “Huh!,” UL’s chief public safety officer said with a nervous laugh as she adjusted her safety glasses. “Would you say that’s something you...
