Is a cadmium cell the same as a AA battery?

No. A AA battery is a size standard. Some AA batteries might be nickel-cadmium (NiCd) cells, but most common AA batteries are alkaline. 'Cadmium cell' refers to the chemistry, not the size.

Why is cadmium used in these cells?

Cadmium provides a good combination of electrochemical properties, including a stable electrode potential, good cycle life for recharging, and reasonable energy density for its time.

Are cadmium cells still common?

Pure 'standard' cadmium cells for calibration are rare, superseded by electronic standards. Nickel-cadmium (NiCd) rechargeable batteries are still used but are less common than newer technologies like lithium-ion due to cadmium's environmental toxicity and lower energy density.

What should I do with an old cadmium cell?

Cadmium is a toxic heavy metal. Old cadmium cells must be disposed of as hazardous electronic waste at designated recycling centres, not in regular household bins.

cadmium cell

Low

UK/ˈkædmiəm ˌsɛl/US/ˈkædmiəm ˌsɛl/

Technical / Scientific

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Definition

Meaning

A type of electrical cell (battery) that uses cadmium as the negative electrode, often in combination with a nickel or silver electrode, typically rechargeable.

More broadly, it can refer to any electrochemical cell where cadmium is a key component of one electrode, valued for its stable voltage, rechargeability, and use in specific technical applications like photometry.

Linguistics

Semantic Notes

A compound noun where 'cadmium' specifies the material used in the electrochemical cell. The term is highly specific to electrochemistry and electrical engineering.

Dialectal Variation

British vs American Usage

Differences

No significant lexical differences. Spelling conventions follow standard British/American English for other words in a sentence.

Connotations

Identical technical connotations in both varieties.

Frequency

Equally low frequency in both technical registers.

Vocabulary

Collocations

strong

nickel-cadmium cellsilver-cadmium cellstandard cadmium cellrechargeable cadmium cell

medium

voltage of a cadmium cellelectrode in a cadmium cellto construct a cadmium cell

weak

small cadmium celllaboratory cadmium cellold cadmium cell

Grammar

Valency Patterns

The [ADJ] cadmium cell [VERB] ...A cadmium cell [VERB] as a [NOUN]

Vocabulary

Synonyms

Strong

NiCd

Neutral

NiCd cellnickel-cadmium battery

Weak

cadmium batteryrechargeable cell (context-dependent)

Vocabulary

Antonyms

primary celldisposable batterylithium-ion cell

Phrases

Idioms & Phrases

“[None directly associated]”

Usage

Context Usage

Business

Rare; might appear in technical procurement or specifications for backup power systems.

Academic

Used in chemistry, physics, and engineering textbooks or papers on electrochemistry.

Everyday

Virtually never used.

Technical

Standard term in electrical engineering, battery technology, and laboratory instrument calibration.

Examples

By Part of Speech

verb

British English

The circuit was designed to be cadmium-celled for stability.
[Note: 'cadmium-cell' as a verb is highly non-standard and fabricated for this exercise.]

American English

The system was cadmium-celled to meet the voltage standard.
[Note: 'cadmium-cell' as a verb is highly non-standard and fabricated for this exercise.]

adverb

British English

[No standard adverbial form exists.]

American English

[No standard adverbial form exists.]

adjective

British English

We need a cadmium-cell reference source for the photometer.

American English

The calibration required a cadmium-cell voltage standard.

Examples

By CEFR Level

This is a battery. It is called a cadmium cell.

A cadmium cell is a type of rechargeable battery used in some tools.

The nickel-cadmium cell, though older technology, offers a very stable discharge voltage.

In the laboratory, the Weston standard cadmium cell was historically employed as a primary voltage standard due to its exceptional reproducibility.

Learning

Memory Aids

Mnemonic

Think of 'CAD' as in Computer-Aided Design for precision, and 'MIUM' sounds like 'medium' – a cadmium cell is a precisely engineered medium for storing electricity.

Conceptual Metaphor

A cadmium cell is a CHEMICAL WORKHORSE / A STABLE FOUNDATION (due to its reliable voltage).

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

Avoid translating 'cell' as 'клетка' (biological cell). The correct terms are 'элемент' or 'гальванический элемент'.
Do not confuse 'cadmium cell' with 'cadmium sulfide cell' (photocell), which is a different device.

Common Mistakes

Pronouncing 'cadmium' as /kædˈmaɪəm/ (incorrect stress).
Using 'cadmium cell' to refer to any rechargeable battery.
Misspelling as 'cadnium cell' or 'cadmium sell'.

Practice

Quiz

Fill in the gap

For precise voltage calibration, the old laboratory still relied on a standard .

Multiple Choice

What is a key characteristic of a standard cadmium cell?

FAQ

Frequently Asked Questions

: No. A AA battery is a size standard. Some AA batteries might be nickel-cadmium (NiCd) cells, but most common AA batteries are alkaline. 'Cadmium cell' refers to the chemistry, not the size.
: Cadmium provides a good combination of electrochemical properties, including a stable electrode potential, good cycle life for recharging, and reasonable energy density for its time.
: Pure 'standard' cadmium cells for calibration are rare, superseded by electronic standards. Nickel-cadmium (NiCd) rechargeable batteries are still used but are less common than newer technologies like lithium-ion due to cadmium's environmental toxicity and lower energy density.
: Cadmium is a toxic heavy metal. Old cadmium cells must be disposed of as hazardous electronic waste at designated recycling centres, not in regular household bins.