I'm not sure why my particular device was refurbished. It looks perfect and acts perfect (or at least normal) except for the charging issue.
I'd pony up for a $10 charger or even $15 to test it out, but since genuine Acer chargers are so expensive ($45 shipped? Ouch!), if the problem persists I will send it to Acer for repair.
I've not had much time to use my tablet over the past few days, but it was down below 50% charge so I put it on the charger again. I'll find out what surprises are in store when I get home from work.