3． The output cannot be completely guaranteed to prevent backflow. When connecting the battery, that the output voltage of the power module is always higher than the battery voltage, or connect a diode in series with the positive terminal of the output to conduct one-way conduction to prevent the battery voltage from backflow and burning the power supply. Product parameters: Product name: CNC DC step-down power supply; Product model: -6522C (color screen model); Input voltage: 6.0-75.00V; Output voltage: 0.0-65.00V; Output current:0-22A; Output voltage accuracy: ±0.3% + 3 words (can be calibrated); Output power: 0-1430W; Output current accuracy: ±0.5% + 3 words (can be calibrated) 4. When connecting the output terminal to the battery, be careful not to reverse the positive and negative poles. 5. The product is a step-down module, the maximum output voltage = input voltage * 0.95-1V. 1. AC power cannot be input, let alone 220V mains power. 2. The maximum allowed input voltage is 75V, and no overvoltage input or reverse polarity connection is allowed. Voltage resolution: 0.01V; Current resolution: 0.01A; Data group storage: 11 groups; Silicone buttons: 5; Screen size: 1.8-inch upgraded large screen, 36 x 29mm viewing range, Weight: 0.661386786 Pounds, Manufacturer: Awwertse