I just paid off my D600 the other day.Today it started to act up. I thought, "you got to be kidding me." It would randomly shut down. When I got home I tried my other battery and it works fine. Thank you Lord.
But now I got to come up with $50 for a new battery. When I got the camera he couldn't send the batteries from Australia. So I bought a cheapy no name to tide me over. Well I guess I got to figure out how to buy a new one. But at least it isn't the camera so I am happy.