The blinking icon indicates there is not a good connection between the Charge Base S and battery. First, try adjusting how the controller is rested on the Charge Base S. If that does not resolve it, try applying rubbing alcohol with a cotton swab to the contacts of the battery; do not apply to the contacts on the Charge Base S. If this does not resolve the issue, please contact customer support here for further assistance.
Make sure when using the Charge Base S, to use the batteries with the contacts on the back that are provided. If the light on the base is blinking with one battery, try using the other battery. If the issue persists after trying the other battery, please contact customer support here for further assistance.
Red indicates a 0-25% charge level, Orange is 50% and Green is 75%. Once the battery has a full charger, the indicator will turn off.