I had a Braun shaver for a very long time — long after the battery had died. It worked great while plugged into the wall, which was fine because I kept it in the bathroom next to an outlet. I switched to a new shaver after receiving one as a gift. I had no idea that modern shavers (maybe most electronics these days?) only run from the battery, rather than passing through from the wall. It’s a reminder of a time before forced obsolescence that I miss.