This is nice, and well done getting all the way to production!
As you point out in one of your posts, the meaning conveyed by the same battery level differs between extroverts and introverts.
For me, low social battery would mean "please leave me alone", whereas for others it would mean "please talk to me".
I wonder how that could be conveyed, of if there is another analogy other than battery level? Maybe a "talk to me traffic light"?!