Abstract: The sealed feed-through (1) interconnects two cells of an alkaline storage battery (eg. for an electrically propelled car) by passing through a wall (2) of the battery. The battery includes a monobloc casing of plastic material defining at least two battery cell compartments which are separated by said wall, and said wall has an orifice for receiving the feed-through. The feed-through comprises a first portion (10) for electrical connection to electrodes (7) of a first polarity in a first one of the cells and a second portion (20) for electrical connection to electrodes (7') of opposite polarity in the other cell. In an alkaline battery, conventional welding techniques for making such feed-throughs in lead-acid batteries are not applicable because metals such as nickel steel must be used instead of lead. The resulting welding temperature would destroy the plastic wall.