Abstract: A method of manufacturing a battery consisting of one or several cells piled on each other and integrally connected along their circumferences. Each cell comprises a zinc anode, an alkaline electrolyte, a cathode of mercuric oxide, silver oxide or manganese dioxide or a mixture thereof, and a cell casing in the form of a plastic cup. A terminal plate is located on both sides of the plastic cup, said terminal plates abutting a substantial area of the outer and the inner side of the bottom, whereby at least one terminal plate comprises at least one projecting knob extending through a comparatively small aperture in the bottom of the cup and being connected by spot welding to the second terminal plate in such a manner that the plates sandwich and under pressure abut the material in the bottom of the cup. Prior to the spot welding a mass is added in the form of bitumen to the aperture in the bottom of the cup, the sealing mass being pressed sideways during the spot welding.