BATTERY HAVING INTERNAL ELECTROLYTE FLOW PATCH AND/OR INTEGRAL HEAT SINK

In one aspect, a battery is provided having at least one cathode sheet formed from a metallic foil electrode coated with an active material and at least one anode sheet formed from a metallic foil electrode coated with an active material. The anode sheet is disposed in overlying relationship with the cathode sheet so as to provide at least one cathode/anode electrode pair. The battery further includes a separator between the cathode and anode sheets, electrolyte, and a packaging encasing the at least one cathode and anode sheets and containing the electrolyte. The active material on the cathode sheet(s) is formed to have ridges and depressions therein enabling the electrolyte to flow and wet the electrode(s).