142 | Dual Battery - Dual Battery Connected (Extender Detected)

Written by Alex Kovell

Last published at: September 9th, 2025

Description

The extender battery has detected the establishment of dual battery mode, charging or discharging will be temporarily halted for safety.

⚠️Triggers of Error Code

The following are possible causes of error code 142:

  • While powered on the e-bike, the main battery detects that the extender battery has been connected.

⚠️Caution

Prior to proceeding with the troubleshooting steps below, AVOID swapping the current Extender Battery with another functioning bike or replacing it with a new Extender Battery on the problematic bike for testing purposes. Incorrect steps may result in misdiagnosing the issue and potentially triggering additional error codes.

 

1 Check the Connection Cable

Long press the power button to turn off the e-bike.
Ensure the connection cable between the Extender Battery and the e-bike is securely plugged in. If it's loose, plug the connector back in tight carefully.

 
 

2 Reboot the e-bike

Reboot the e-bike to check if the error code still exists. If this doesn't fix the issue, proceed to the next step.

 
 

3 Replace the Connection Cable

Replace the [Connection Cable] between the extender battery and the e-bike with a new spare, then reboot the e-bike to check if the error code still exists. If this doesn't fix the issue, proceed to the next step.

 
 

4 Replace the Charging Socket Cable

Replace the main battery's [Charging Socket Cable] with a new spare, then reboot the e-bike to check if the error code still exists. If this doesn't fix the issue, proceed to the next step.

 
 

5 Replace the Extender Battery

Replace the [Extender Battery] with a new spare, then reboot the e-bike to check if the error code still exists. If this doesn't fix the issue, proceed to the next step.

 
 

6 Replace the Main Battery

Replace the [Main Battery] with a new spare, then reboot the e-bike to check if the error code still exists. If this doesn't fix the issue, proceed to the next step.

 
 

7 Reach out to the Service Team if you need additional support!

Contact Customer Care or the Hyena Service Center for further technical assistance.

 
 

 


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