There are three main components of a battery: two terminals made of different chemicals (typically metals), the anode and the cathode; and the electrolyte, which separates these terminals. The electrolyte is a chemical medium that allows the flow of electrical charge between the cathode and anode.
What is in batteries?
An electric battery is a device consisting of one or more electrochemical cells with external connections provided to power electrical devices such as flashlights, smartphones, and electric cars. When a battery is supplying electric power, its positive terminal is the cathode and its negative terminal is the anode.
What is on the inside of a battery?
Take a single-use alkaline battery for instance. These are the non-rechargeable type batteries that come in AAA, AA, C, D, 9 volt and various button cell sizes. On average, 25% of the battery is made up of steel. 60% of the battery is made up of a combination of materials like zinc, manganese and potassium.