A battery including: a casing having a first end portion, a second end portion, and an inner surface defining a chamber in which an electrolyte is disposed therein; a conductive lining disposed within the chamber adjacent the inner surface of the casing, the conductive lining being configured for electrical communication with a first battery terminal at the second end portion of the casing; a permeable separator sheet disposed between the electrolyte and the conductive lining; a conductive rod having a first end configured for electrical communication with a second battery terminal at a first end portion of the casing, and, a second end configured for contact with the electrolyte; an opening disposed in the second end portion of the casing; a sealing member configured for arrangement between at least a sealed position which restricts ingress of a liquid into the chamber via the opening, and, an unsealed position which allows ingress of a liquid into the chamber via the opening and into contact with the electrolyte so as to cause a potential difference to be produced between the first and second battery terminals; and a biasing member configured for urging the conductive lining and the first battery terminal into electrical communication with each other; wherein the battery is characterised in that the biasing member is disposed between an inward-facing surface of a first end cap of the first end portion and the conductive lining whereby the biasing member is configured for urging the conductive lining in a direction towards the first battery terminal so as to maintain electrical communication between the conductive lining and the first battery terminal. a casing having a first end portion, a second end portion, and an inner surface defining a chamber in which an electrolyte is disposed therein; a conductive lining disposed within the chamber adjacent the inner surface of the casing, the conductive lining being configured for electrical communication with a first battery terminal at the second end portion of the casing; a permeable separator sheet disposed between the electrolyte and the conductive lining; a conductive rod having a first end configured for electrical communication with a second battery terminal at a first end portion of the casing, and, a second end configured for contact with the electrolyte; an opening disposed in the second end portion of the casing; a sealing member configured for arrangement between at least a sealed position which restricts ingress of a liquid into the chamber via the opening, and, an unsealed position which allows ingress of a liquid into the chamber via the opening and into contact with the electrolyte so as to cause a potential difference to be produced between the first and second battery terminals; and a biasing member configured for urging the conductive lining and the first battery terminal into electrical communication with each other; wherein the battery is characterised in that the biasing member is disposed between an inward-facing surface of a first end cap of the first end portion and the conductive lining whereby the biasing member is configured for urging the conductive lining in a direction towards the first battery terminal so as to maintain electrical communication between the conductive lining and the first battery terminal.