Patent ID: 7166988

Claim:
A portable electronic apparatus comprising: a first module including a first charging circuit adapted to be coupled to a first power source, and a first battery unit coupled to said first charging circuit; a second module connected removably to said first module, and including a second charging circuit adapted to be coupled to a second power source, and a second battery unit coupled to said second charging circuit; a connecting unit for establishing electrical connection between said first charging circuit and said second battery unit when said second module is connected to said first module; and a control unit coupled to at least said first charging circuit; said control unit enabling said first and second battery units to be charged independently and respectively through said first and second charging circuits using the first and second power sources when said second module is disconnected from said first module; said control unit being coupled to and controlling said connecting unit for enabling said first and second battery units to be charged through said first charging circuit using the first power source when said second module is connected to said first module.