Xiaomi has launched a small Segway device, the Ninebot Mini (小米九号平衡车), for an attractive price of USD 310 (RMB 1999). This is the first device the both Xiaomi and Segway have launched since the acquisition last year. This self-balancing scooter looks similar to the traditional Segway but it costs way less (less than a tenth) and is much smaller. Xiaomi…