Plz help! Nine of ES2 with external battery stops charging at around 90% : r/ninebot
First time opening a Ninebot ES4 external battery. | Segway Ninebot ES4 external battery disassembled. | By Perth Electric Scooter Repairs | G'day everyone this is Nick from Perth Electric Scooter Repairs.
Ninebot Segway ES3 ES4 Internal Battery Not Charging - diagnosed and fixed! - YouTube