No mention of the battery pack or charger, the most troublesome components.<p>The in-wheel motors are kind of neat. Those could be useful for motion control projects, especially since they're three-phase synchronous and can be run all the way down to zero speed with high torque. More info about the power drive system for the motors would be useful. What are they using to switch all that current? No heat sinks are visible, so either the switching is really efficient or the drive electronics will overheat.<p>It's good to see precision motor control at this price point. These devices are rather impressive technically. Once somebody starts shipping them with safe batteries and full battery protection circuitry, they could be popular again. Boosted brand electric skateboards got it right; they used a safer battery chemistry, figuring the boards would be abused. Good call.<p>Most recent major hoverboard fire: Orlando, FL, 3 days ago. 3 apartments destroyed.