I like the 2-outlet style of the Drok because, having taken it apart, I know that Output II definitely doesn’t have the data wired to it. Instead, it has a chip on the data lines to spoof being a high-power USB supply. The data lines are only passed through to Outlet I, allowing not only regular USB communication, but also standard QuickCharge 2 and QC3 signalling to work properly.
The nice thing about this is that I can use it on any random USB outlet- say in a hotel room or airport- and not worry about my phone being at risk of attack through that vector. And you can see how much power the outlet is providing- some can only source 500ma, so you might want to take the time to look around the room for something better.
Some of my devices are low power enough that I can use the Drok as a splitter so I can charge two things from my single battery pack. Just make sure the supply is putting out only 5 volts to your Output I device before plugging in your second Output II device- since it is possible to get over 12 volts from a QuickCharge 2 or 3 power supply with the appropriate host device plugged into Output I.
That said, I haven’t used any of the other meters, so cannot speak to other comparative advantages or disadvantages.
There are also USB C volt/amp/power meters too. They’re newer so not as well user tested. As always, check the Amazon reviews.
