The leclanché cell is an open circuit cell in which carbon and zinc are the plates.
A great advantage of the leclanché cell is that when not in use there is but little material waste.
A more recent form of leclanché cell is shown in cross-section in Fig. 62.
If you wish to use the buzzer simply to call some one occasionally, a dry battery or leclanché cell is best.
An examination of Fig. 63 shows that the dry cell has all of the essential elements of the leclanché cell.