Patent ID: 9002413
Filing Date: 2015-04-07
Classification: H04M,H04W,Y02D

Abstract:
1. A combination cell phone comprising: a cell phone having a cell phone housing; a battery assembly disposed in the cell phone housing, and the battery assembly having a primary battery and a secondary battery and wherein the primary and secondary batteries are isolated from one another and each is for powering a load derived from the cell phone; a circuit disposed in the cell phone housing and a switch is operatively associated with the cell phone and the primary and secondary batteries such that either the primary or secondary battery is capable of powering the cell phone; the circuit includes a delay logic circuit operatively associated with a switch allowing for uninterrupted cell phone operation when switching from the primary battery to the secondary battery; the circuit includes a primary battery passgate component for selecting or isolating the primary battery from a load; the circuit includes a secondary battery passgate component for selecting or isolating the secondary battery from the load; and, wherein the primary passgate component includes a first NFET passgate, a first PFET passgate, a second NFET passgate and second PFET passgate each being operatively associated with the delay logic circuit and for allowing either the selection or the isolation of the load from the primary battery.