The production of tetrabasic lead sulfate by means of solid state reactions at high temperatures allow the formation of powders having a particle size of less than 10 m. In the methods the chemical reaction that takes place between lead oxide and different sulfated compounds occurs in a single high temperature treatment. The sulfated compounds used in the present invention to produce the tetrabasic lead sulfate are: PbSO₄, 3PbO.PbSO₄.H₂O, H₂SO₄ and (NH₄)₂SO₄. There are lead-acid battery pastes produced using the tetrabasic lead sulfate made, the lead-acid battery plates made with the pastes, and the lead-acid batteries subsequently made with the plates.