Patent ID: 7158815
Filing Date: 2007-01-02
Classification: H02J,H04B,H04W,Y02D

Abstract:
1. An apparatus, comprising: a first connector configured to receive battery power from a first mobile device; a second connector configured to selectively transmit battery power to a second mobile device; and a comparator configured to compare an input voltage level of the first mobile device transmitted from a regulator, an input voltage level of the second mobile device received from the second mobile device, and a reference voltage level, wherein the input voltage level transmitted by the regulator is less than or equal to the reference voltage level, wherein the second connector is configured to transmit battery power to the second mobile device if the input voltage level of the first mobile device or the reference voltage level is less than the input voltage level of the second mobile device, and to restrict a flow of battery power to the second mobile device if the input voltage level of the first mobile device or the reference voltage level is greater than the input voltage level of the second mobile device, in response to a signal generated by a transistor based on a comparison of the input voltage levels of the first and second mobile devices and the reference voltage level.