Как по Английски будет accu

noun

A container consisting of one or more cells, in which chemical energy is converted into electricity and used as a source of power.

Примеры использования:

A camera battery

adjective

Using a system of producing a large number of eggs cheaply by keeping a lot of chickens in rows of small cages (= boxes made of wire)

Примеры использования:

Battery farming, battery hens/eggs