Would this make a good battery for smartphones? Why or why not? The reaction at the anode can be represented as the ordinary oxidation of zinc: 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 zinc can serves as both a container and the negative electrode. A common primary battery is the dry cell (Figure 1). Primary batteries are single-use batteries because they cannot be recharged. Watch this video to learn more about batteries.
A few batteries of each type are described next. There are two basic types of batteries: primary and secondary. Thus, no single battery is “best” and batteries are selected for a particular application, keeping things like the mass of the battery, its cost, reliability, and current capacity in mind. This type of battery would supply nearly unlimited energy if used in a smartphone, but would be rejected for this application because of its mass. For example, the mass of a car battery is about 18 kg or about 1% of the mass of an average car or light-duty truck. Real batteries strike a balance between ideal characteristics and practical limitations. An ideal battery would never run down, produce an unchanging voltage, and be capable of withstanding environmental extremes of heat and humidity. In principle, any galvanic cell could be used as a battery.
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