He might be like me and leaves a nikonites window open all day for when I get a few minutes here and there.The OP is online right now, I don't know why he is not answering.
I just got my D3200 on the 5th and had the exact same issue. I used the camera for maybe 10 minutes on the 5th and maybe 10 minutes on the 6th. Today I had a completely depleted battery. I was using the LCD screen, so I suspect that might drain the battery.?
Did you get a knock-off battery with your kit?