LEAD ACID STORAGE BATTERY

A lead-acid battery includes at least one element and an electrolyte solution. The element includes a positive electrode plate, a negative electrode plate, and a separator interposed between the positive electrode plate and the negative electrode plate. In the at least one element, the negative electrode plate contains a negative electrode material, the negative electrode material contains an organic expander (excluding a lignin compound) containing a unit of a monocyclic aromatic compound, and a distance between the positive electrode plate and the negative electrode plate is less than 1.1 mm.