I guess I'm just one “Wild and Crazy Guy”, because I didn't check with anyone. I would be happy to discuss the possibility of the current leaking down, but I am not willing to take apart my only charger to check it.
Also I suspect any current lost would be so small no one would care. At most the battery is left in the charger 8 to 12 hours after it shuts off. The capacity of the battery is so small any meaningful current drain would show up as a voltage loss at the battery. I will test voltage of a battery standing for 8 hours vs battery voltage of battery left in a charger for 8 hours. But since I have already been using this method with success I don't believe I will lose much, maybe not any.
Since I don't have a laboratory I will have to make due with simple observations. But even if there is a voltage drop an amateur like my-self would need to consider the possibility that we are only loosing the surface charge, due to the internal resistance of the battery itself. Because, as we both know that would effect our measurements with out giving meaningful information.
I'm glad you brought this up, although a little resentful that you assume I have no clue.