I'm working through some uninterrupted power supply requirements and trying to determine the actual power draw for the Beryl AX and Opal devices. I'm interested in power draw for standard WiFi operation with a VPN connection, no USB devices attached. I highly doubt the units pull 3A, which is what the supply provides.
I currently don't own either product so I can't give any further insight other than the official spec sheets. I would base it off the worst case scenario then at least you are covered.