Ninebot ESX Error Code 49
"Built-in battery firmware is outdated. Please update to the latest version."
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 48 - Next Error Code: Ninebot ESX Error Code 50
Cause
Error 49 is thrown when the ESC has updated firmware but the BMS is on a version < 1.3.0.
Fix
Download a newer BMS firmware version by updating it in the app or manually and flash to both the internal and external battery.