The image shows an electric AA or AAA battery, in a vertical position, sectioned so that its interior can be seen.
The battery, in a general sense, is an electrochemical medium for storing energy and producing energy through the chemical oxidation-reduction reactions inside the battery.
Thus, the chemical energy present in the materials of which it is composed is converted into electricity.
It has two center poles, one at the top and one at the bottom of the battery.
The positive pole, always highlighted, is called the cathode and is made of metal oxide, and the negative pole is called the anode and consists of a metal.
In the image, the positive pole is shown upwards, by a bulging of the battery tip marked with a thickened line, narrowed towards the upper center.
The negative pole is represented at the base of the battery, in the center, in the shape of a thin rectangle, short, horizontal and embossed.
On the marginal inside of the battery, respectively in the cell walls, there is the electrolyte or ionic conductor, a liquid that favors the energy transfer between the two poles.
The electrolyte is rendered by a thickened line, outlining a vertical rectangle.
The center of this rectangle is filled with dotted texture, representing the positive electrode made of manganese dioxide.
The thin, vertical and embossed rectangle in the center of the dotted texture highlights the cathode or the carbon current collector.
The outer walls of the battery cell are made of an insulation tube and then of a metal jacket with a paper or plastic label.