Abstract: A system for integrated charging is provided. The system for integrated charging includes a charging device capable of charging battery devices, each of which has a different charging specification.

Abstract: The present disclosure relates to a free voltage adapter for charging, in which when the free voltage adapter is connected to a charging object for charging, a voltage required for charging the charging object is first predicted in advance, and after that, a voltage corresponding to the charging voltage of the charging object is supplied, thus with a single adapter, a plurality of different types of charging objects with different charging voltages can be charged simultaneously.

Abstract: Disclosed is a power supply device including a supply mode determination unit that determines an executable mode among a battery charging mode and a constant power supply mode based on power supplied from a power supply, an output terminal electrically connected to an electronic device, an output type analysis unit that receives a power supply type and a power supply standard of the electronic device from the electronic device, and a transformer unit that transforms the power supplied from the power supply based on the determined power supply type and the determined power supply standard and transmits the transformed power to the electronic device.

Abstract: A battery charging device comprises: a charger body, which has at least two charging grooves formed on one side of the upper surface thereof and a display arranged on the other side of the upper surface thereof to display a charged state, and is connected to an external power source to enable power supply; multiple charging kits, each of which detachably is coupled in each charging groove, has a mounting groove formed on one surface thereof to allow a battery to be detachably placed in the mounting groove, and charges the battery placed in the mounting groove when the kits have been coupled in the charging groove; and a controller, which is arranged in the charger body, determines a charge condition of the battery placed in the mounting groove, and performs a control such that power necessary for charging is supplied from the charger body to the battery.