How does a primary cell differ from a secondary cell?

The distinction between a primary cell and a secondary cell is primarily rooted in their ability to be recharged. A primary cell is designed for single-use and cannot be recharged after its energy is depleted. It's typically utilized in applications where long shelf life is valued and where the inconvenience of frequent replacements is manageable. Examples include alkaline batteries used in remote controls or flashlights.

In contrast, a secondary cell is designed for multiple charge and discharge cycles, allowing it to be recharged and reused many times. This makes secondary cells particularly suitable for applications where a consistent power supply is needed, such as in smartphones and electric vehicles. This capacity to be recharged significantly enhances their usability and cost-effectiveness over time.

The other choices do not accurately reflect the fundamental differences between primary and secondary cells. For instance, size and power storage capabilities can vary widely among both cell types and do not serve as definitive distinguishing characteristics. The lifespan of a secondary cell may also depend on usage and charging cycles, often resulting in a longer overall lifespan compared to a singular lifecycle of a primary cell. Understanding these properties sheds light on the practical applications and selection criteria for each type of cell.