DANIELL CELL

"A very early non-rechargeable battery. It consisted of a glass jar containing copper and zinc electrodes, each immersed in their respective acidic sulfate solutions. The two solutions were separated by a porous clay cylinder separator. It was a galvanic cell in which the spontaneous electrodissolution of zinc and electroplating of copper provided the electrical current. It was one of the earliest practical ""laboratory"" electrical sources; but, of course, it was not much use outside the laboratory. "