Any question like those has pretty much, been answered, you just have to look. Even the driveway/parkway one. That falls under sematics, but I don't have instant access to the answer. I could Google it.
Years ago, I did a trivia colum because everyone was sending me these lists of "facts". I was going through one and got to thinking, cause there were a few that were bs and I knew it. Researched, and very few were I able to find correct.
Your question was great. Notice I said it stumped me. When someone does that, that's something. ;-) still, I have an addiction called curiosity. When an imponderable question is asked, I get curious. Had you not asked, I would have lived my life without checking.
This was a good meme. I notice that there aren't any other comments, but then, it's early. You are onto something, though. I usually answer these questions, anyway, but here's an idea. Before making these memes, check for the answer. Use this template I just slapped together, philosorator Q&A, to ask, and answer, the question. Put a link in the comments, but keep the answer in the meme short. Like your question, the professor would reply, "There still is a B cell battery, but it's being phased out".
I always recommend checking two or three independent articles and list links to them in the comments field.