The Electric Power Storage Co Ltd, sometimes referred to as the Electrical Power Storage Co, was established in 1882. With a head office in Great Winchester Street, London and a factory in Millwall, the company was the first in the country to manufacture batteries, from 1883. It was the maker of EPS Storage cells.

The company took on the patents of an early rival, the Faure Electric Accumulator Co, to develop its battery cells. Faure Electric Accumulator Co and developed an unreliable accumulator and, when they attempted to improve it by using patents issued to Sellon and Volckmar, the Electric Power Storage Co, as holders of the Sellon-Volckmar patent, threatened Faure with legal action.

The Electric Power Storage Co employed a number of engineers who went on to other things, including Bernard Drake and John Gorham who set up Drake and Gorham in 1886, which became a major firm of electrical contractors, and Hugo Hirst, who became chairman of GEC in 1910.

In 1884, the company demonstrated two boats on the Thames, powered by the Electric Power Storage Co accumulators. The following year saw a successful demonstration of a battery-driven tramcar by South London Tramway Co using accumulators manufactured by the Electric Power Storage Co.

From 1886, under the management of William Henry Patchell, the Millwall Works began developing plant for public and private electricity supply. Batteries continued to be an important electricity power source, particularly for public transport, and in 1888 a new Pullman vestibule car running on the London-Brighton railway line had electric lighting supplied via Electric Power Storage Co accumulators linked to a dynamo. The following year, the company demonstrated electric disc brakes powered by their accumulators.

In 1889, the Electric Power Storage Co joined a number of other electrical equipment manufacturers to form the Electric Construction Corporation, but continued to trade under its own name. By 1891, the Electric Power Storage Co had taken over a secondary battery manufacturing plant in Millwall from the Electric Construction Corporation, and business grew over the following year. The Electric Construction Corporation was formally wound up in 1893.

In 1897, Electric Power Storage Co supplied accumulators to power electric taxi cabs, which were demonstrated in London.

The company effectively came to an end in 1915, when it amalgamated with Pritchett and Gold Ltd. In 1920, the amalgamated company was incorporated as Pritchett and Gold and EPS Co Ltd.