A significant disadvantage of such SoFlow scooters is the rigid connection of the battery. This is an engineering error. Such a scooter does not have shock absorbers, so even on small bumps, vibration is felt. The vibration of the battery contacts (and this is a rather large current) will definitely lead to instant loss of electrical contact, the occurrence of an arc, and burning of the contacts. As soon as I saw that the battery is connected in a hard way (not by cable), I immediately understood that there would be problems. Problems appeared somewhere after 2000 km - at a distance of 8-10 km, I had to stop 3-4 times to remove and insert the battery, because contact was lost and the system froze. I'm really sick of it. I cut off the contact connector of the battery, tore off the corresponding connector on the scooter frame and connected the battery without a connector - just a cable through reliable contacts (you can just solder). The scooter got a new life, the battery started like new. Now I have already driven 3600 km and there are no problems with disconnection during vibration on an uneven road surface.