Improved handling of battery recognition tasks in an electronic device such as a cell phone, smart phone, computer system, recording device or others is facilitated. An intermediate piece sitting on the base body conveys the light from the radiation source in the direction of a body region of the patient to be treated. The detection system includes a voltage divider resistance with a power supply, a connector for connecting the identification circuit of the ink box and the voltage divider resistance with the power supply, a voltage supplier, a voltage detector connected to the connector and the voltage supplier, and a controller connected to the voltage supplier and the voltage detector. The light assembly includes a light source, a battery, and a magnetic switch that stops a flow of power to from the battery to the light source when in the presence of a magnetic field and allows power to flow from the battery to the light source when the ball is removed from the magnetic field. Each pixel of an image is mapped to a corresponding pixel of the screening matrix.