Patent ID: 7852043

Claim:
An information processing apparatus, comprising: a storage unit which stores an AC adapter capacity identification information; a first outputting unit which outputs the AC adapter capacity identification information stored in said storage unit; a setting unit which sets a threshold value effective to control the power consumption of said information processing apparatus based on the AC adapter capacity identification information output from said first outputting unit; a detection unit which detects the power consumption of said information processing apparatus; a control unit configured to control the power consumption of the information processing apparatus such that, when the power consumption detected by said detection unit exceeds the threshold value set by said setting unit, the control unit adjusts the power consumption to a value approximately equal to or lower than the threshold value, a re-chargeable battery; and a third outputting unit which outputs extension unit connection information representative of whether said information processing apparatus is connected to an extension unit which extends a predetermined function to said information processing apparatus, wherein, the storage unit and the outputting unit are both located within the information processing apparatus, said control unit includes (1) a first control unit which controls such that the charging power to said battery is lowered and (2) a second control unit configured to control a clock frequency such that the clock frequency of said information processing apparatus is lowered, said setting unit sets a first threshold value which is used by said first control unit and a second threshold value which is used by said second control unit, and said setting unit sets the first threshold value and the second threshold value based on the AC adapter capacity identification information output from said first outputting unit and the extension unit connection information output from said third outputting unit.