Another update. I decided to do a battery test in this Nexdock similar to the X Mini, because I noticed yesterday that it seemed like the battery drained pretty fast. Sure enough, I just had my Librem 5 docked and left it idle with a stopwatch running. After 50 minutes the Nexdock battery is at 50%. Of course my Librem 5 is still at 100% battery, but this points to less than 2 hours of use with cellular and wifi on.