Patent ID: 8209557

Claim:
A computer set for optionally coupled to an optical disk drive and a battery unit in the shape of a disk drive, the computer set comprising: a first disk-drive connecting port including a set of disk terminals, a set of battery terminals, and a set of power terminals; a power diverter circuit coupled electrically to said first disk-drive connecting port; and a first power source for electrically coupled to said power diverter circuit when the computer set is optionally coupled to the disk drive so as to permit said power diverter circuit to supplies a first electrical power P 4 for the disk drive 200 ; wherein, when the computer set is optionally coupled to the disk drive, the sets of disk terminals and power terminals are electrically coupled to the disk drive and when the computer set is optionally coupled to the battery unit, the sets of battery terminals and power terminals are coupled electrically to the battery unit so as to permit the battery unit to supply a second electrical power via said power diverter circuit.