Abstract: A lead-acid battery includes: a housing that includes a container including one open end and a lid closing the opening of the container; and an element that includes a plurality of positive electrode plates and a plurality of negative electrode plates alternately arranged in the container with a separator interposed therebetween. Each positive electrode plate includes a first foot protruding toward a bottom face of the container, and each negative electrode plate includes a second foot protruding toward the bottom face of the container. The first foot and the second foot are disposed at positions different from each other when viewed from the arrangement direction of the elements.

Abstract: A separator for sealed cells is provided which attains a high degree of intimate contact with electrode plates, enables the cell to have reduced internal resistance, is less apt to suffer a fatigue phenomenon even upon repetitions of charge/discharge, and improves the life of the cell. Fine rubber particles are adhered to the surface of fibers of a non-woven fabric constituting the separator so that the fine rubber particles are present among the fibers. These fine rubber particles function as elastic bodies to absorb relative positional changes of the fibers and improve the compressive repulsion of the separator.