Alkali metal electro-chemical storage cell

An alkali metal electro-chemical storage cell comprising anode and cathode regions containing alkali metal and cathodic reactant respectively, a cationically conductive solid electrolyte member separating the anode and cathode regions, and respective anode and cathode current collectors and associated connection terminals, the anode current collector comprising a further cationically conductive solid electrolyte member extending into alkali metal in said anode region and separating a contact breaker region from alkali metal in said anode region, a body of the alkali metal contained in the contact breaker region, normally up to at least a predetermined level in a functional undamaged cell, a first electrically conductive member providing electronic interconnection between alkali metal in the contact breaker region and alkali metal in the anode region when at the minimum state of charge of the cell, and a second electrically conductive member providing electronic interconnection between the connection terminal associated with the anode current collector and said alkali metal in the contact breaker region only when at and above said predetermined level.