Abstract: A charger for blocking power when charging a battery is provided. The charger includes a charging voltage generating unit that generates a charging voltage for charging a battery. The charger includes a control unit with at least one microprocessor for controlling calculation and comparison and determination required for charging. A back-flow preventing unit is disposed between the charging voltage generating unit and the battery and has a plurality of diodes. A driving unit is connected between the control unit and an AC power supply unit and includes a relay for supplying/blocking AC power to the charger according to the control of the control unit. An alarm unit provides notification of a contact failure or charging completion when charging the battery. A cable connector is connected to a target device.

Abstract: Disclosed is a power source device having a standby power-cutoff function, which is to be used to charge a battery. The power source device comprises: a micro-USB connector (24) for connecting to the power source unit (20) of a smartphone when the battery of the smartphone or the like is to be charged; and a power generation unit (32) supplying DC charging power to the smartphone (20) from an AC input power source. The present invention includes: a control unit (33) having at least one microprocessor for controlling the overall operation and functioning of a power source device (30); a power supply/cutoff unit (34) supplying/cutoff the AC input power to the power generation unit (32) according to the control of the control unit (33); and a current-sensing unit (CT) connected so as to monitor the current from the power supply/cutoff unit (34), provide the control unit (33) with the current, and provide an indication of the charging state of the battery.

Abstract: The present invention is a standby-power cutoff device for an electronic product using a power adaptor.

Abstract: A standby electric power cutoff apparatus for an electronic product is disclosed.