Battery or accumulator is an electrical cell which takes place inside a reversible electrochemical process (can be reversed) with high efficiency. What is meant by a reversible electrochemical process, is in the battery can last through the conversion of chemical into electrical power (discharge process), and instead of electricity into chemical energy (charging back by way of regeneration of the electrodes used, namely by passing an electric current in direction (polarity) opposite in the cell.
Each battery cell is composed of two different kinds of electrodes, namely a positive electrode and negative electrode dipped in a chemical solution
