I have one of these. The detergent gizmo is a hard plastic shell with an interesting shape, powdered detergent inside, and a plastic film cover that looks like it’s heat-sealed on. It contains no electronics whatsoever. You can refill it, and the only limitation is that it’s kind of awkward to open, fill, and re-seal. The easiest way IMO is to cut a large flap in the hard plastic on the sides, then tape it down after refilling. It works fine.

Also, the Miele powdered detergent, in my personal opinion, sucks. And it leaves some residue behind. Yuck.