secondary battery

The electric accumulator or secondary battery, one of the most useful appliances, is the result of electrolysis reversed.

The "plates," as the electrodes in a secondary battery are termed, are generally large metal plates.

Her secondary battery consisted of six 4-inch revolving guns, discharging seventy shells a minute when operated by electricity.

The soil must be of such a quality as to convert this territory into an enormous secondary battery.

He did not think, however, that a light secondary battery was by any means an impossibility.