The AirPods (Pro) are only switched off when they are in the case and charging. Without the case, it is not possible to switch off Bluetooth headphones. Furthermore, the charging case cannot be switched off. As soon as the headphones are in, they are charged. The only way to turn off the case and AirPods is only when you empty the batteries. The AirPods are designed to give users the maximum audio experience. Many may not be aware of this, but AirPods are only intended to be charged and serve no other purpose. So you see, the case has nothing to do with charging the AirPods.