The author talks about how he dislikes this characterization exactly because it's so binary and doesn't seem to be accurate for most people who fall into the "ambivert" center of the bell curve. The whole article is a beautiful breakdown of how social interaction is much more multi-faceted than this. You should read it.
Admittedly I didn’t get that [1] far, thanks for pointing it out. I read the first half but he lost me at conversational dynamics (I mainly come here for the comments).
The battery analogy was a good way for me to understand my own experience and seemed like progress from the traditional definitions of introvert and extrovert.