dry cell

Components of a dry cell.

Components of a dry cell: 1. brass cap, 2. plastic seal, 3. expansion space, 4. porous cardboard, 5. zinc can, 6. carbon rod, 7. chemical mixture<./p>

A dry cell is a type of small Leclanché cell containing no free fluid. In the commonest type the electrolyte is ammonium chloride paste, the positive electrode (anode) a central carbon rod, and the negative electrode (cathode) the zinc casing. Dry cells are widely used in flashlights and portable radios.