Understanding Indicator Lights on the VEX IQ (1st gen) Battery

The color of the LED indicates the status of the Battery Charger:

Diagram illustrating the VEX IQ battery specifications, including voltage, capacity, and connection details, relevant for educational robotics and programming within the VEX IQ platform.

NOTE: The LED is near the front of the Battery Charger and is solid green when plugged into a power source with no Robot Battery connected. 

The chart below shows the status of the LED color when a Robot Battery is inserted into the Battery Charger.

LED Color   Status

Diagram of VEX IQ battery components, illustrating the battery pack, connections, and indicators, relevant for understanding power management in VEX IQ robotics projects.

Solid Green Robot Battery is Charged or not inserted.

Remove fully charged Robot Battery or Insert the Robot Battery properly into Battery Charger.

For instructions on How to Charge the VEX IQ Robot Battery click the link.

Diagram illustrating the VEX IQ battery specifications, including dimensions, voltage, and connection details, relevant for users building and programming robots within the VEX IQ platform.

Solid Red Charging.

Take no action. Let the Robot Battery finish charging. 

You will know when the solid green light is displayed.

Diagram showing the VEX IQ battery components, including battery pack, connectors, and charging instructions, illustrating how to properly connect and maintain the battery for optimal performance in robotics projects.

Blinking Green Over Temperature Fault.
This means the Robot Battery is overheated. 

Remove the Robot Battery and let it cool down before inserting it back into the Battery Charger.

Diagram showing the VEX IQ battery, highlighting its components and connections, used for powering VEX IQ robotics systems in educational settings.

Blinking Red Robot Battery Fault.
This means the Robot Battery is completely drained. 

One solution is to manually charge the Robot Battery to the point where it has enough power to charge on the Battery Charger.
Click here for instructions on how to manually charge the Robot Battery.

For more information, help, and tips, check out the many resources at VEX Professional Development Plus

Last Updated: