Canon 1D mark IV low battery flashing when camera is switched off

Hi, I have a Canon 1D mark IV... like every Canon DSLR I had when battery is drained camera will not power on, when switched on it will show battery icon flashing... so this is my problem on 1d Mark 4 if battery is empty as soon as I insert battery in camera it starts flashing battery icon even if it is turned off by switch, when battery is recharged camera powers on and works, is this normal for 1D mark IV?