Patent ID: 7436149

Claim:
A battery-powered information handling system, comprising: a system load; a charger regulator that is configured to produce charge current from a current supply, said current supply comprising alternating current or direct current from an AC adapter; and battery and charging circuitry coupled to said charger regulator and configured to provide said charge current to a first battery pack that is a main system battery pack of said battery powered information handling system; wherein said battery and charging circuitry of said battery-powered information handling system is further configured to be coupled to a second battery pack that is a battery pack of a physically separable battery-powered input or input/output device to allow at least one of: a flow of said charge current produced by said charge regulator from said battery and charging circuitry to charge said second battery pack of said physically separable battery-powered input or input/output device, or a flow of discharge current from said second battery pack of said physically separable battery-powered input or input/output device to power said system load of said battery-powered information handling system, or a combination thereof.