My Watson battery wouldn't work in the D500 either. I also received mine free from B&H on the last camera I purchased.
I too noticed the charger without the cord. I'm not even going to unpack mine. I'll just use my older charger. The cord makes it a little more user friendly.
I too noticed the charger without the cord. I'm not even going to unpack mine. I'll just use my older charger. The cord makes it a little more user friendly.