NOVELTY - Shock and pin activated reserve battery comprises cell stack of electrodes; ampule containing electrolyte; activating system; former (8); and battery case (2) into which cell stack, ampule and activating system are placed and closed by battery lid (11). The cell stack of electrodes has annular shape comprising carbon electrode (21) and lithium electrode (23) separated by glass separator (22). The stack arrangement is isolated from one another by another separator selected from non-conducting plastic, phenolic disc, or plastic cup (20).    USE - Shock and pin activated reserve battery used for ammunition fuzes.    ADVANTAGE - The shock and pin activated reserve battery can reliably deliver electrical power, has long storage life and high power capabilities, has increased shelf-life, and higher energy density and faster activation.    DETAILED DESCRIPTION - Shock and pin activated reserve battery comprises cell stack of electrodes; ampule containing electrolyte; activating system; former (8); and battery case (2) into which cell stack, ampule and activating system are placed and closed by battery lid (11). The cell stack of electrodes has annular shape comprising carbon electrode and lithium electrode separated by glass separator. The stack arrangement is isolated from one another by another separator selected from non-conducting plastic, phenolic disc, or plastic cup. The glass ampule (5) is protected with flexible rubber sleeve (4) and over which lead weight (3) is assembled as proportional weight compensation element for ampule having thionyl chloride electrolyte. It is positioned at hollow portion of former above activating system of battery which comprises anvil (7) and spring (6) fixed firmly to cell support disc (10) at base of battery and capable of breaking ampule, resting on spring, at predetermined acceleration and capable of distributing electrolyte into void space of cells, thus activating cells and generate electrical power. The sub assembly is enclosed in battery case and closed with battery lid and further covered by inserting in plastic battery cover (1) tightly and suitably closed with plastic lid (15).    DESCRIPTION OF DRAWING(S) - The drawings show sectional views of shock and spin activated reserve battery.    Battery cover (1)    Battery case (2)    Lead weight (3)    Rubber sleeve (4)    Glass ampule (5)    Spring (6)    Anvil (7)    Former (8)    Cell support disc (10)    Battery lid (11)    Plastic lid (15)