I just used one of the 2 "bad chargers" that I mentioned in the above post to charge a couple phones to see where it would cut off. Halfway through discharging the second phone, it stopped charging. It flashed the blue led when it cut off. My wife quickly disconnected it before I got a chance to check the voltage. I did check the voltage within one minute of it cutting off. The cell was at 3.3x volts.
The charger was definitely running hotter than seems appropriate. I had the lid off. I think it would have been too warm with the lid on. I didn't check temperature or current while it charged. I will try another run sometime this week and report back.
I don't know if good units also get hot discharging. I think I will pot mine with the first recipe from here anyway.