Method of power management, portable system and portable power bank

A portable system capable of providing electric power to an electrical appliance, said portable system comprising:

• a portable electronic device;
• and
• a portable power bank coupled to said portable electronic device and to be further coupled to the electrical appliance;
• wherein said portable electronic device is configured to
• receive power information from said portable power bank,
• control said portable power bank to operate in a first mode, in which electrical power is provided to the electrical appliance, when said portable electronic device determines from the power information that said portable power bank has sufficient amount of power, and
• control said portable power bank to operate in a second mode, in which electrical power is not provided to the electrical appliance, when said portable electronic device determines from the power information that said portable power bank does not have sufficient amount of power.

A portable power bank for use with a portable electronic device and an electrical appliance, said portable power bank comprising:

• a communication interface configured for coupling to the portable electronic device;
• a power outputting module;
• a power transferring port configured for coupling to the electrical appliance;
• a switching unit coupled between said power outputting module and said power transferring port and operable to make or break a circuit path between said power outputting module and said power transferring port;
• and
• a control unit coupled to said communication interface, said power outputting module, and said switching unit;
• wherein said control unit is responsive to control from the portable electronic device via said communication interface to control said control unit for controlling switching operation of said switching unit.