Patent ID: 8201008
Filing Date: 2012-06-12
Classification: G06F

Abstract:
1. A battery module usable with a computer system, the battery module comprising: a power port to receive an external power; a battery to output an auxiliary power; an interface port to receive an external signal; and a controller to output a power through the interface port, and to prevent the power from being transmitted to the interface port according to the external signal received through the interface port, and wherein the interface port is connectable to an external computer system to receive the external signal from and generated by the external computer system, and the external signal represents that the external computer system receives a second power from an external power source other than the power from the interface port, wherein the controller selectively supplies one of the external power and the auxiliary power as the power to the interface port, and prevents at least the one of the external power and the auxiliary power from being transmitted to the interface port, according to the external signal.