I had a chance to test this setup in public. The Audiolink is proximity sensitive to the Rondo 3 where it would start to cut out if not a good connection. The optimal setup is clipping the Audiolink to my shirt collar near my CI and the Roger neckloop in my pocket connected by a 3 ft audio cable. I’m still playing around but overall satisfied with this vs the mini battery pack. Also of note, the mini battery pack streaming with Roger X 03 lasted about 2 hrs before needing to replace the battery. I got more than 3 hours with the neckloop and the battery was still more that 60% (based on the LEDs).
Note, I could also use the Rondo 3 telecoil with the neckloop but it has a lot of “noise” when the tcoil is plugged in. Medel advised to put the Rondo 3 in airplane mode to reduce this noise. That process is a pain but remains an option too.