These were the highest energy density cells known at that time. In the electrochemical cell, a spontaneous redox reaction occurs. A redox reaction is also known as an oxidation-reduction reaction. In all electrochemical processes, oxidation occurs at the anode, and reduction occurs at the cathode. Chemical batteries, which are most commonly used, power the watches people wear and the flashlight campers use to light their path.
Batteries also power the car and the portable radio many people bring to the park.
The electrochemical cell was one of the discoveries that benefited human kind by bringing about the battery. The invention of the electrochemical cell has made life easier on humans, and has allowed us to create a vast inventory of inventions that are wholly powered through electrochemical cells.