Leclanché cell

A Leclanché cell was an early ancestor of the modern dry cell battery. It was patented by Georges Leclanché in 1866. It contained a conducting solution (electrolyte) of ammonium chloride, a cathode (positive terminal) of carbon, a depolarizer of manganese dioxide, and an anode (negative terminal) of zinc. The chemistry of this cell was later successfully adapted to manufacture of the dry cell.