Brand New Segway F2 Pro Shows Error Code 21
November 10, 2025 6:38 PM97
On November 9, 2025, my Segway Ninebot F2 Pro scooter suddenly stopped while I was riding it and displayed error code 21... on the screen. The day before, this happened while going downhill with 90% battery, and today it occurred again on a flat road with 50% battery. The malfunction happened under dif