Ninebot ESX Error Code 20

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.

Error 20 on a Ninebot ESX.

"External battery voltage is abnormal, check battery, control card, cable connected."

If you clicked the wrong error code, go back to the Error Code Index.

Cause