recharged
Primary Batteries Primary batteries are single-use batteries because they cannot be recharged. A common primary battery is the dry cell Figure 17.10 . The dry cell is a zinc-carbon battery. The zinc can serves as both a container and the negative electrode. The positive electrode is a rod made of carbon that is surrounded by a paste of manganese IV oxide, zinc chloride, ammonium chloride, carbon powder, and a small amount of water. The reaction at the anode can be represented as the ordinary oxidation of zinc: Zn s Zn 2+ aq + 2e .