A universal charger includes a portable charger housing, an universal charging arrangement, and an energy input device. The universal charging arrangement includes a charging circuitry for managing electricity charging of the rechargeable battery, and a plurality of charging terminals movably provided in the battery compartment of the portable charging housing, wherein the charging terminals are adapted to move in the battery compartment to accurately and adjustably align with the battery terminals of the rechargeable battery. The energy input device is electrically connected with the charging circuitry, which is capable of charging a wide variety of electronic devices by acquiring power through a convention USB port.