Ninebot ESX Error Code 20
"External battery voltage is abnormal, check battery, control card, cable connected."
If your Ninebot ESX(ES1, ES2, ES3, or ES4) or SNSC (1.0 or 1.1) is beeping or has a red wrench icon and flashes this code, read below.
If you clicked the wrong error code, go back to the Error Code Index.
Previous Error Code: Ninebot ESX Error Code 19 - Next Error Code: Ninebot ESX Error Code 21