Ninebot ESX Error Code 50

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Error 50 on a Ninebot ESX.
"External battery firmware is outdated.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 49 - Next Error Code: Ninebot ESX Error Code 51


Error 50 is thrown when the ESC has updated firmware but the BMS is on a version < 1.3.0.


Download a newer BMS firmware version from Ninebot ESX BMS Firmware and flash to both the internal and external battery.