Description This high-performance DC-to-DC UPS module delivers a maximum output of 47.5W across four dedicated ports (12V, 9V, and 5V), making it an ideal solution for powering multiple networking devices or electronics simultaneously. Designed for 3S Li-ion battery configurations (12.6V full charge), the board features a sophisticated 99% accuracy rate with a tight $\pm0.05V$ voltage tolerance to ensure stable power delivery. It is engineered with a comprehensive safety suite, including short-circuit, high-voltage, polarity, and thunder protection, while the compact SMD-based architecture incorporates a four-stage LED battery level indicator for real-time monitoring. The wide input range of 12.6V–13.0V ensures efficient charging and seamless transition to battery power, maintaining precise 10.5V low-voltage cutoff to protect cell longevity.