| abstract |
A lead-acid battery includes a separator that retains an electrolytic solution, a positive electrode plate, a negative electrode plate, and a container. A negative electrode material contains a bisphenol condensate, and a theoretical capacity ratio of the negative electrode material to a positive electrode material is 0.85 or more and 1.2 or less. A decrease in the electrolytic solution can be suppressed, while the charge acceptance can be improved. |