Drone Nerds Inc of Aventura, Fla., is recalling about 700 self-balancing scooters/hoverboards. The lithium-ion battery packs can overheat, posing a risk of the products smoking, catching fire and/or exploding. No incidents or injuries are reported. This recall involves certain Drone Nerds self-balancing scooters, commonly referred to as hoverboards . The hoverboards have two wheels at either end of a platform and are powered by lithium-ion battery packs. They were sold in a variety of colors.