Open tube battery housing

A battery comprising:

• a battery case including a housing having side walls defining a first open end and a second open end, the battery case including a separate top cover to cover the first open end of the housing and a separate bottom cover to cover the second open end of the housing;
• a first electrode located within the case, wherein the first electrode includes an electrode material that is directly attached to the inner surface of the side walls of the housing such that the electrode material defines a hollow core within the first electrode, the hollow core having a cross-sectional shape in a plane perpendicular to a longitudinal axis of the hollow core which is the same as a cross-sectional shape of the housing in a plane perpendicular to a longitudinal axis of the housing;
• a second electrode located within the case and wherein the second electrode is positioned within the hollow core;
• a first terminal coupled to the first electrode and exposed outside the case;
• and
• a second terminal coupled to the second electrode and exposed outside the case.