A battery cell has a plurality of first and second electrodes of opposite polarities that are interleaved. Each of the first and second electrodes is a sheet of non-woven fabric having a first edge from which a tab projects, and a second edge transverse to and substantially longer than the first edge. The non-woven fabric is coated with a metal in a manner that forms a strip along the second edge which has a greater electrical conductivity than areas more remote from the second edge. The strip extends along the tab. A first terminal is electrically connected to the strip along the tabs of the first electrodes, and a second terminal is electrically connected to the strip along the tabs of the second electrodes.