In a heterogeneous network deployment that includes a macro base station and a low power node, a geometry indicator is transmitted by the low power node to facilitate the calculation of a path loss difference value at a user equipment using power estimates of the received synchronization signal from the macro base station and received geometry indicator signal from the low power node. A conductive member disposed inside the compression spring may extend between the pair of spring cages. Systems, graphical user interfaces, and machine-readable media are also provided. The device also comprises a pad having a charging surface.