The PC Power PCMU1018LL 20000mAh Mini DC UPS provides a massive energy reserve designed to keep your essential networking devices running without disruption through long power cuts and load shedding. Built with a huge 20000mAh lithium-ion battery capacity, this powerful backup unit delivers an extended runtime of up to 7 hours, making it perfect for demanding home environments or small office setups. It ensures that your Wi-Fi router, ONU, modem, or CCTV surveillance cameras stay online seamlessly, preventing any loss of data or connection lag during professional remote work, online classes, and entertainment streaming. With a maximum output power of 18W, this multi-functional mini UPS can power multiple electronic devices at the same time. The interface layout includes three dedicated DC output ports at 5V/2A, 9V/1A, and 12V/1A to easily match the voltage specifications of various router brands. It also features a built-in USB 5V/2A port to serve as an emergency power bank for smartphones and dual RJ45 PoE ports supporting 15V/0.6A and 24V/0.6A for power-over-ethernet setups like IP cameras. Equipped with an intuitive LED display to monitor battery and power status, the device provides a microsecond zero-delay automatic switchover that prevents device reboots when utility power fails. Encased in a safe, compact housing, the unit features built-in multi-protection circuitry against overcharging, over-discharging, overcurrent, overloading, short circuits, and overheating to keep your valuable networking hardware secure.