I have never tried 640wh, because the space to install battery pack is limited. But it seems interesting that install two battery packs on each side and control board on top, since 40 A has already equipped with two battery pack ports.
My unicycle adopts larger tire(14*2.5 type), when riding, it seems more stable than narrower one(14*1.25), but it is also less flexible.
As for 40A, pedal tiltback has been added, app is under designing, users could change the tiltback speed via app.
Max speed is depended by motor power, with higher motor power capacity, max speed of 40A could far over 40 km/h.
Major update:
1.two output DC 12 V ports in 2 pin and 4 pin, users could add headlight, taillight, led strap or blue tooth speaker to listen to music;
2.one output DC 60 V port in 2 pin, it can supply power for other board, especially for one wheel motorcycle which has LED screen display;
3. I/O port, users could add electronic brake, suitable for one wheel motorcycle with handle bar;
4. two battery pack ports;
5.one remote controller port;
6.LED power indicator, it supports up to 6 leds;
7.one electronic accelerator port, suitable for one wheel motorcycle with handle bar;
The max current of that board is 2A, if you want to add lights, a 60V -to-12V converter.
