You must turn off your EV3s to charge them. If the light turns green and doesn't turn red when charging, the dock is still working. Be sure to charge your EV3s for 4-6 hours.
Clean the small golden circular adapters on the EV3s and the charging ports within the charging dock.
After cleaning and charging, turn your EV3s on, set the volume to a medium level, and see if you are
able to hear any sound.
If this did not help you, please leave a message detailing your issue and include your order number if
If your hearing aid is charging, but still not emitting sound, see the link below: