So when it powers off, it goes into a sleep mode. That sleep mode doesn't require alot of power, but if you have it set to turn on if the camera detects vibrations, it uses the cars battery. Mine is plugged in all the time and it only powers on when I turn the car on or it feels vibrations. With the vibration setting, it will turn on when I open my car door. But if your power source isn't powered when the car shuts off, then it doesn't use any power, just what the camera has stored up. Hope that helps 

Yes …. You can use anywhere it goes with you… I use mine in our camper 

I would ask your pediatrician but I’m guessing probably not 

Thank you for your question. This model no touch screen, but it can be easily operated by the buttons on the panel. 

The camera does not have an on/off switch. If you want to switch them off completely, you have to disconnect them from the power supply (e.g. when not in use) but you can also leave them plugged in.