Bests & Worsts Reviews from Amazon

ET910 - It support a full 20V @ 3A. The problem though is that it will always negotiate down to the lowest setting. So unless you have a power source hard set at 60 watts, you wont get it. Using this to test with random power sources will not allow you to verify full wattage if they negotiate. Also, when given a full 60 watts the unit heats up quick so if you have a lot of cables to test then you'll be waiting a while for the unit to constantly cool down as it will shut off often if too hot. While I had a fixed power source for a couple days I wont always be able to use that. When I had it I was able to quickly identify bad/cheap cables that were not as advertised when it came to wattage capability. So while this device can be useful, it's only useful with the expensive power source I was able to borrow. Using it with random chargers was useless for me. I'm afraid this device is just too behind the times now. ET920 - Even their ET920 is getting behind the times as the USB-A port itsn't USB3.1. It's USB 2.0 only. I think every single cable I plugged into it only got 5V @ 1.3A max even some of those cables were USB3.1 80 watt cables.