Importance

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Abstract

An intelligent power supply system for a portable computer, the computer having a central processing unit (CPU), and being operable in response to power supplied from at least two chargeable batteries or an alternating current (AC) adapter, includes means for detachably coupling the batteries to the computer and a PC-CPU for controlling power supply independent of the CPU. The PC-CPU has means for receiving battery select information for controlling power supply and generating a control signal. The power supply system further includes battery control circuit means, connected to the AC adapter and the batteries, for selecting and controlling the AC adapter or one of the batteries based on the control signal. Accordingly, the proper battery for the usage can be installed in the portable computer operable on battery power, and the computer can be operated continuously on the battery power for a long period of time.

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First Claim