The ECH power supply and battery charging module allows you to implement a flexible power supply scheme for the device ensuring continuity of operation after a power failure of the main power supply. Together with an external acid (gel) battery with a nominal voltage of 12V, it constitutes a reserve power supply system. The module constantly monitors the state of charge of the battery and recharges it automatically when the main supply voltage is present. If the main voltage fails or its value drops below the battery voltage, the receiver is powered from the battery.