I have an ES2 with an external battery. I have not had any error messages or "red wrench" pop up on my screen. HOWEVER, lately, when I'm riding my scooter, the 4 LED lights on the top of the external battery are flashing while I'm riding. When they start flashing, I can feel the scooter slow down. BUT - after a few second, they stop flashing and the scooter speeds back up.
Has anyone experienced this? Does anyone know what that root cause might be? Is my wheel/motor overheating or something like that?
Any advice would be appreciated!! Thanks everyone.