Same problem, same time frame here....I wonder if its a software issue. Mine also had the charging icon and says it is charging when it is not plugged in....additionally I had it on my car charger and I pulled the charger out of the socket and the light that indicates the charger is plugged in stayed on...so the power was running backwards out of the phone at that point maybe?
I think it's a software issue...I can get mine to work but it's hit or miss, some chargers that worked last week don't work at all, some work once in a while, none work 100% of the time. All chargers work correctly with other phones.
Done all kinds of battery gyrations....none seem to work.