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A battery

American  

noun

Electronics.
  1. an electric battery for heating the filament or cathode heater of an electron tube.


Etymology

Origin of A battery

First recorded in 1920–25

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

A battery that is frequently fast-charged with high power loses its range, on average, at twice the rate of a battery charged at a lower power, according to telematics company Geotab.

From The Wall Street Journal Jul. 5, 2026

A battery of physical and memory tests, baselined against individual pre-season scores, is used in unclear cases to decide whether a player has suffered a concussion or if they can return to the field.

From BBC Aug. 6, 2025

A battery stores power in the form of chemical energy and through reactions converts it to the electrical energy needed to power vehicles as well as cellphones, laptops and many other devices and machines.

From Science Daily May 23, 2024

A battery can be charged flexibly, using renewable energy at times of the day with low demand for power, he said.

From Seattle Times Oct. 24, 2023

A battery changed hands, it was somewhat too large, a metal flange was beaten back.

From "Snow Falling on Cedars: A Novel" by David Guterson

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