Question
Which of the following battery chemistries is not rechargeable?
Answer Options
- A) Nickel-cadmium
- B) Carbon-zinc
- C) Lithium-ion
- D) Lead-acid gel-cell
Correct Answer: B
Explanation
A battery that is not rechargeable is called a primary cell, meaning its internal chemical reaction is permanent and irreversible. Carbon-zinc (the chemistry used in cheap, older ‘heavy duty’ batteries) is a primary cell and must not be recharged.
The other options—Nickel-cadmium (\text{NiCd}), Lithium-ion (\text{Li-ion}), and Lead-acid (like the batteries used in cars or large power backup systems)—are all secondary (rechargeable) battery types commonly encountered in amateur radio.
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