The Universal Li-ion Battery Charger is a compact and lightweight charger designed for charging Lithium-ion batteries. It features a DC jack connector of 2.5mm and an output of 42V 2A, making it compatible with a wide range of devices. The charger is equipped with multiple protection features, including over-voltage, over-current, and short-circuit protection, ensuring safe and efficient charging. Its portability and versatility make it an ideal solution for charging Lithium-ion batteries in various applications.