Abstract: A soft magnetic powder composition for an inductor core comprises 60 to 80 wt % Fe—Ni alloy powder, 5 to 25 wt % Fe—Si alloy powder, and 10 to 30 wt % Fe—Si—Al alloy powder based on a total alloy powder and a method of manufacturing the inductor uses the soft magnetic powder composition.

Abstract: Methods for activating a secondary battery are provided, as well as methods for manufacturing a secondary battery, which include: providing a secondary battery including an electrode assembly and an electrolyte solution in a battery case, pre-aging the secondary battery at room temperature to provide a pre-aged secondary battery; initially charging the pre-aged secondary battery to provide an initially-charged secondary battery; aging the initially-charged secondary battery at room temperature to provide a room-temperature-aged secondary battery; fully charging the room-temperature-aged secondary battery to a voltage of 4.4V or more to provide a fully-charged secondary battery; and degassing the charged secondary battery to remove gas inside the fully-charged secondary battery. According to these methods, it is possible to increase the remaining amount of an electrolyte solution inside an electrode by fully charging a secondary battery.