the world > matter > physics > electromagnetic radiation > electricity > electric charge, electricity > [noun] > process of charging > producer (3)
A device for increasing or maintaining an electrostatic charge. Also Kelvin replenisher. Now historical.
An apparatus to produce excitation (excitation, n. 4); a machine, as a small auxiliary dynamo, used to energize the field magnets of a dynamo; a…
A person who or thing which electrifies something (literal and figurative).