A while back I did an experiment, I placed two lead sheets in a H2SO4 solution, exposed it to a charging current and tested the battery there after. As I understand it, the battery worked by the metal combination of PbO2 and Pb, and through electrolysis I formed the PbO2 directly on the plate. The result of the experiment was a working battery. Now my question: If in fact what I understand is correct, why the fuss with coating the lead plated with PbO2, using other less natural ways? Like using a plating solution of lead nitrate, or pressing the powdered lead dioxide right onto the electrode. On my search for suitable replacements of Platinum electrodes I ran a crossed lead dioxide, and although I am not sure quite yet if lead dioxide would fill my needs, it did raise the question for me. Thanks.