A battery

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noun Electronics.

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

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CAN YOU ANSWER THESE COMMON GRAMMAR DEBATES?

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Question 1 of 7

Which sentence is correct?

His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

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Compare B battery, C battery.

Origin of A battery

First recorded in 1920–25

Words nearby A battery

abatement, abatis, abat-jour, abator, abattage, A battery, abattoir, abaxial, abaya, abb, Abba

How to use A battery in a sentence

To do so connect the grid as in Fig. 115 to the positive terminal of the A-battery.
Letters of a Radio-Engineer to His Son|John Mills
We shall call the battery which heats the filament the “filament battery” or sometimes the “A-battery.”
Letters of a Radio-Engineer to His Son|John Mills