Ninebot ESX Error Code 44

File:NinebotESXError44.png

Error 44 on a Ninebot ESX.

"External battery has default S/N, change external battery"

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.