nicad
Học thuậtThân thiện
Definition
- Noun:
- A rechargeable battery that uses nickel oxide hydroxide for its positive electrode (cathode) and metallic cadmium for its negative electrode (anode). It is known for its ability to deliver consistent power and for its relatively low self-discharge rate when idle.
Usage
- Nicad is a technical term, often written as NiCad or NiCd, which is an abbreviation of its chemical components: Nickel and Cadmium.
- It is used as a countable noun to refer to a single battery unit or as an uncountable noun to refer to the technology type.
- Common contexts include electronics, emergency lighting systems, power tools, and older portable devices.
Examples
- "The emergency exit signs are powered by long-lasting nicad batteries."
- "Many early cordless phones used NiCad battery packs."
- "Compared to newer lithium-ion batteries, nicads are heavier and suffer from the memory effect."
Advanced Usage
- "Memory effect": A property associated with nicad batteries where they appear to lose maximum energy capacity if they are repeatedly recharged after being only partially discharged. Proper conditioning can help mitigate this.
- To prevent the memory effect, it's best to fully discharge your nicad battery before recharging it.
Variants and Related Words
- NiCad (n): A common alternative spelling, using chemical symbols (Ni for Nickel, Cd for Cadmium).
- NiCd (n): Another common abbreviation using chemical symbols.
- Nickel-cadmium battery (n): The full technical name.
- Rechargeable battery (n): The general category to which nicads belong.
Synonyms
- Rechargeable cell: A general synonym, though it does not specify the chemistry.
- Secondary cell: A technical term for any rechargeable battery.
Notes on Different Meanings
- The word nicad has only one specific meaning related to battery technology. It is not used in other general contexts.
Related Idioms/Phrasal Verbs
- The term nicad is a technical noun and is not used in idiomatic expressions or phrasal verbs.
Noun
- a rechargeable battery with a nickel cathode and a cadmium anode; often used in emergency systems because of its low discharge rate when not in use