Well when I used it earlier today, it didn't seem to be hitting like it usually does when it's charged well. So I plugged it in to the charger and the light has not changed to green after about 3 hours now. It's plugged in to a power strip, which my laptop is also plugged into and fully charged, so that's not the problem. Plus, I have my pass through plugged into the same power strip and it is working fine.
It's still charging then, I'd guess. Maybe give it a bit. If it is real warm though, unplug it and set it in a safe place.

