A wireless charger system for a battery pack is disclosed. The wireless charger system in one exemplary embodiment may include a wireless charger apparatus for receiving an external power source to transmit a power signal via a charging power transmitter block and a battery pack for receiving a power signal from the wireless charger apparatus to charge power in a battery cell and supplying a power source to a portable terminal block. The wireless charger apparatus may also have an outer body composed of a resonant converter for supplying power to the battery pack and a wireless charger case having a central controller installed inside. The wireless charger case may have a protruded round portion formed around the rear edge and a display block provided as the sloped surface in the front portion thereof.