NOVELTY - The battery has several battery cells (1-30) arranged abutting each other. The maximum value of voltage difference between battery cells is determined based on correlation type of conduction distance and voltage difference between cells. The conduction distance between cells is set to the distance corresponding to maximum voltage difference in correlation data. Each cell is arranged according to the conduction distance, such that the maximum voltage difference between groups of cell is below specified value.    USE - Assembled battery such as nickel-hydrogen battery, nickel-cadmium battery, etc., used in electrically-driven vehicle, electrically-driven bicycle, hybrid vehicle, etc.    ADVANTAGE - A highly reliable high-voltage assembled battery having safety properties is obtained by setting the maximum voltage difference between groups of cell to a lower value, hence heat emission is suppressed reliably, even if an electrolytic solution leaks during emergency.    DETAILED DESCRIPTION - The battery cell conduction distance is set by adjusting the exposed areas of electrically conductive locations such as battery bottom face which is not covered by insulation coating in each cell. The correlation type of conduction distance between the cells, an electrical potential difference, and voltage difference between the cells are related by a predetermined expression. The correlation type of conduction distance is calculated according to the heat emission temperature degree, when an electrolyte solution is filled between the cells. An INDEPENDENT CLAIM is included for arrangement method of assembled battery that involves connecting two or more battery cells like alkaline cells, and arranging them according to the conduction distance between them. The conduction distance between the cells which adjoin each other is calculated according to the distance corresponding to the maximum voltage difference.    DESCRIPTION OF DRAWING(S) - The drawing shows an exemplary view of the arrangement of the assembled battery.    Battery cells (1-30)