A flat geometry interconnect media connects the electrodes of a laminated power source in electrical contact with positive and negative power input terminals on a planar substrate. The interconnect media is in the form of a flexible, laminated strip having a central conductive lamina sandwiched between a pair of insulation laminae. The flexible, laminated interconnect media is folded about the anode and cathode of the laminated power source for presenting positive and negative battery terminals in substantially coplanar relation for electrical contact with substrate lands or metallization deposits situated on one side of a printed circuit board. The laminated battery supplies backup operating power to integrated circuit devices such as static random access memories.