Two or more electrochemical cells enclosed in a container and electrically interconnected in an appropriate series/parallel arrangement to provide the required operating voltage and current levels.

Under common usage, the term "battery" also applies to a single cell if it constitutes the entire electrochemical storage system.

A device that generates electric power through chemical reactions: A battery is a direct-current voltage source consisting of two o more electrochemical cells connected in a series or parallels to convert chemical energy into electrical energy.

The cell of a battery contains a negative electrode, a positive electrode, an electrolyte held between the electrodes, and a container or housing.

In contrast to the alternating current available in homes, businesses, cities, etc. from the electric utility companies, batteries deliver a direct current that always flows in one direction.

Colloquially, the term battery is often used in place of the more proper term cell. The common 1.5 volt flashlight battery is actually a single cell.

The length of time, under specified conditions, that a battery can be stored so that it keeps its guaranteed capacity.