While charging the controllers on the Charge Base, the indicator will light up and the orange light on the controller will light up. Once the controller is fully charged, the indicator will disappear on the Charge Base and the orange light will disappear.
Additional dongles for the Charge Base can be found HERE.
There is a possibility there might be an issue with the Charge Base, please contact customer support for further assistance. Customer support can be contacted here.
No, the dongles used in the Charge Base are different from the ones used in the Modular Charge Station.