nickel-cadmium battery
C2Technical, formal
Definition
Meaning
A rechargeable battery that uses nickel oxide hydroxide and metallic cadmium as its electrodes.
Often shortened to NiCd or NiCad, it was a common type of rechargeable battery known for its robustness and ability to deliver high current, but it has been largely superseded by newer technologies like lithium-ion due to its memory effect and environmental concerns.
Linguistics
Semantic Notes
The term refers specifically to the chemical composition (nickel and cadmium). While still understood, it is now often referenced historically or in contexts comparing battery technologies.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning. The shortened form 'NiCad' is slightly more common in American English.
Connotations
In both varieties, it connotes older technology, potential environmental hazard (cadmium is toxic), and the 'memory effect' problem.
Frequency
Frequency is low and declining in everyday use, stable in technical/historical discussions.
Vocabulary
Collocations
Grammar
Valency Patterns
The [device] is powered by a nickel-cadmium battery.We need to replace the old nickel-cadmium battery.Compared to lithium-ion, the nickel-cadmium battery is heavier.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
In procurement or product specifications for older equipment: 'The legacy emergency lighting units still use nickel-cadmium batteries.'
Academic
In materials science or engineering history papers: 'The development of the nickel-cadmium battery represented a significant advance in portable power.'
Everyday
Rare. Possibly when discussing old electronics: 'My dad's old cordless drill has one of those heavy nickel-cadmium batteries.'
Technical
Precise reference in electronics, environmental science (recycling hazardous waste), or comparisons: 'Ensure proper disposal of the nickel-cadmium battery due to its toxic cadmium content.'
Examples
By Part of Speech
adjective
British English
- The NiCd-powered torch is in the shed.
- It's a nickel-cadmium battery pack.
American English
- The NiCad-powered drill needs a charge.
- It's a nickel-cadmium battery cell.
Examples
By CEFR Level
- This remote control needs batteries. They are the rechargeable kind.
- Old phones sometimes had special batteries you could charge.
- The emergency light uses a nickel-cadmium battery because it's rechargeable and reliable.
- You should recycle these old batteries properly; they contain harmful metals.
- While lithium-ion dominates today, the robust nickel-cadmium battery was pivotal for early cordless power tools.
- The memory effect inherent in nickel-cadmium chemistry necessitates a full discharge cycle to maintain capacity.
Learning
Memory Aids
Mnemonic
Think: 'Nickel and Cadmium team up for a re-CHARGE-able partnership.' It's a battery with two metal names.
Conceptual Metaphor
A DURABLE BUT FLAWED WORKHORSE (suggests strength and reliability but with inherent problems).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate 'nickel' and 'cadmium' literally as 'никель' and 'кадмий' in isolation when referring to the battery type. The established term is 'никель-кадмиевый аккумулятор' (Ni-Cd).
- Avoid confusing it with 'никель-металлогидридный' (Ni-MH), which is a different, later technology.
Common Mistakes
- Misspelling as 'nickel-cadium' or 'nickle-cadmium'.
- Using it as a generic term for any rechargeable battery (it is a specific chemistry).
- Incorrect capitalisation: 'Nickel-Cadmium Battery' is only capitalised in titles.
Practice
Quiz
What is a major disadvantage of a nickel-cadmium battery compared to modern lithium-ion?
FAQ
Frequently Asked Questions
It stands for Nickel-Cadmium, the two primary metallic elements used in the battery's electrodes.
Their use has declined sharply in consumer electronics due to the memory effect and environmental concerns, but they may still be found in some specific industrial, medical, or aviation applications where their particular discharge characteristics are valued.
A phenomenon where a nickel-cadmium battery that is repeatedly recharged after being only partially discharged appears to 'remember' the smaller capacity, leading to a permanent loss of maximum energy capacity.
Cadmium is a toxic heavy metal that can leach into soil and groundwater. Nickel-cadmium batteries are classified as hazardous waste and must be recycled at designated facilities to prevent environmental contamination.