Portable charger and method of operating the same

A portable charger comprising:

• a main body;
• a first connector connected to the main body and a commercial power source;
• and
• a second connector connected to the main body and an external apparatus,
• wherein the main body comprises:
• a power line formed between the first and second connectors to allow a commercial electric power to flow through the power line;
• a relay disposed on the power line to intermit the commercial electric power flowing through the power line;
• a data communication unit connected to the power line to perform data communication with the external apparatus connected to the second connector through the power line;
• and
• a switch disposed between the power line and the data communication unit to intermit the connection between the data communication unit and the power line,
• wherein the power line comprises:
• a first power line through which a positive first electric power flows;
• and
• a second power line through which a negative second electric power flows,
• the relay comprises:
• a first relay intermitting only the first electric power which flows through the first power line;
• and
• a second relay intermitting only the second electric power which flows through the second power line, and
• the data communication unit comprises:
• a first data communication unit performing data communication through the first power line;
• and
• a second data communication unit performing data communication through the second power line,
• wherein the switch comprises:
• a first switch independently intermitting a connection between the first power line and the first data communication unit;
• a second switch independently intermitting a connection between the second power line and the second data communication unit;
• and
• a third switch intermitting a driving electric power supplied to the second data communication unit.