Charging the VEX IQ (1st gen) Controller

The Controller can be charged with a USB Cable (the recommended method) or with a Tether Cable. This article will cover each of those charging methods.

Charging a Controller Battery with a USB Cable

Connect the Controller to a Computer or other USB power source.

  • Connect the microUSB to the Controller’s Charge port and the USB to the computer or other USB power source.
  • Ensure the Controller is turned on.

NOTE: The Controller can also be charged by connecting the USB cable to a USB wall adapter.


Charging a Controller Battery with a Tether Cable

  1. Tether the Controller to the VEX IQ Robot Brain.
    • Connect one end of the Tether Cable to the powered-off Brain with a charged VEX IQ Robot Battery and the other end to the Controller.
    • Listen for the “click” when the Tether Cable is inserted into the Controller and Brain to confirm that the Tether Cable is attached securely.

NOTE: Charging the Controller this way is will partially deplete the Robot Battery’s charge.


  1. Turn on the Brain to begin charging.

Indicator Lights

NOTE: There are three possible colors for the Charge/Game LED: green, red, and gray.

Charge / Game LED Color   Status

Solid Green Controller Battery is completely charged

Solid Red Controller Battery charge in progress

Blinking Red Controller Battery fault

Off Not charging