One-touch key switch question

I saw that the key had only one button, but when I switched on for a battery change, I saw that there were two button places inside, and I said I added a photo as if the two-button model would be a container.

Unfortunately, my teacher, the two-button cards are different when you press the slot itself.

[QUOTE = sonerkyl] unfortunately, my teacher, the two-button cards slot is different when you press it, what kind of change happens in the car.