Former BYD and Huawei engineers built a device that turns any bike electric in 10 seconds. It weighs 2.3 kg. It costs $349. And it raised $1.7 million on Kickstarter. The average e-bike costs $1,500 to $3,500. Kamingo costs less than a pair of AirPods Max and snaps onto the bike you already own. Three components: a 0.9 kg motor that clips to your seat stay, a battery that slides into your water bottle cage, and a handlebar controller. 750W peak power. 20 mph. 55 miles of range. The motor uses…