There have been some articles about something like that, yet another revolutionary battery technology to never make it out of the lab. The idea was that the re

There have been some articles about something like that, yet another revolutionary battery technology to never make it out of the lab. The idea was that the refill station would drain depleted sludge (electrolyte or whatever) out of the battery, add new sludge to replace it, and then somehow reprocess the depleted sludge that it had collected. I heard about that at least 20 years ago. Since then, nothing.