ARRL Technician Practice Exam

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Which of the following battery types is not rechargeable?

Lithium-ion
Nickel-cadmium
Lead-acid
Carbon-zinc

The correct answer is: Carbon-zinc

Carbon-zinc batteries are commonly classified as non-rechargeable batteries. They are designed for single-use applications and lack the necessary chemistry to efficiently handle the charging process without suffering from degradation in performance. When these batteries are depleted, they cannot be restored to their original state, which makes them unsuitable for applications requiring recharging. In contrast, lithium-ion, nickel-cadmium, and lead-acid batteries are all specifically designed to be rechargeable. Each of these battery types utilizes different chemistries and mechanisms that allow for the reversal of chemical reactions through the application of an electric charge, enabling them to be used multiple times. Thus, identifying carbon-zinc as the non-rechargeable option emphasizes the different characteristics and purposes of various battery technologies.