First, confirm the outlet you’re using is functioning properly. If the outlet is a GFCI-type, make sure it has not been tripped by pressing the reset button. After testing with a different outlet, confirm your cable is working properly by testing the port with a different cable. Finally, confirm the device you’re attempting to charge is working properly by connecting a different device into the port. If you’ve confirmed the port is malfunctioning, submit your WALLY Mini for a warranty exchange here.