how do I open the car with dead battery key does not work

does your key have to be used electronically? not familiar with infiniti, but can you use the key in the door??? pardon my ignorance, i am a chevy guy!

There is a key cleverly hidden inside your fob of an Infiniti that will work opening the door.

If the Battery is dead I have used a coat hanger to open door and have also called lock smith I was shocked when the battery was dead to find out the emergency key unlocks with battery power. it is electrical not mechanical.(Key)