What is a primary cell?

A primary cell is defined as a type of electrochemical cell that is designed to be used until its chemical reactants are exhausted and then discarded. It is not intended to be recharged or reused once depleted. This characteristic contrasts with secondary cells, which can be recharged after use. Primary cells are commonly found in everyday applications, such as in household batteries (like AA or AAA batteries), where they provide a reliable source of power for various devices until they no longer function.

The options related to rechargeability and usage contexts highlight the true nature of a primary cell clearly. The distinction is essential for understanding battery technology and the applications of different types of cells in various scenarios.