Patent ID: 7528577

Claim:
An electronic apparatus comprising: an information processing unit, a memory coupled to said information processing unit, an RF communication unit coupled to said information processing unit, an audio circuit coupled to said information processing unit, a display, an information reception unit receiving user input information, a secondary battery, a detector detecting battery power remaining on said secondary battery; said information processing unit including a power manager managing the power of said secondary battery, and an information type determination unit determining a type of information received by said information reception unit and having at least one major function and a supplementary function, said memory storing power consumption rates corresponding to the at least one major function and the supplemental function; said power manager initiating restriction of the supplementary function, if a present remaining battery power of said secondary battery as detected by said detector is below a predetermined threshold; said power manager computing the predetermined threshold for said secondary battery in accordance with the information received by the information reception unit and the power consumption rates corresponding to the at least one major function, if the information type determination unit determines that the type of the information received by the information reception unit is a set operating time for securing the at least one major function; said power manager computing a set operating time for the at least one major function according to the remaining battery power at the predetermined threshold in accordance with the information received by the information reception unit and the power consumption rates corresponding to the at least one major function, if the information type determination unit determines that the type of information received by the information reception unit is the predetermined threshold for said secondary battery; said power manager computing an operating time available for the at least one major function in accordance with the remaining battery power of said secondary battery as detected by said detector and the power consumption rates corresponding to the one or more major functions; said power manager computing an operating time available for the supplemental function in accordance with the power consumption rate corresponding to the supplemental function by subtracting the predetermined threshold from the remaining battery power of said secondary battery as detected by said detector; and said power manager displaying, on said display, the present remaining battery power of said secondary battery, the predetermined threshold, the operating time available for the at least one major function and the operating time available for the supplementary function.