Ninebot ESX Error Code 44

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File:NinebotESXError44.png
Error 44 on a Ninebot ESX.
"External battery has default S/N, change external battery"

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 43 - Next Error Code: Ninebot ESX Error Code 45

Cause

This error is caused by the BMS having the default serial number of 4KA0017A1A0001.

This can happen for any number of reasons but usually happens when flashing a firmware file with the serial number included.

Fix

To fix it, change the serial number to a different one by following the guide at Ninebot ESX Change BMS Serial Number.