The case is the outermost covering of the battery.It is usually made of thin steel sheets. It acts as a holder and keeps the battery components and insulation away from the ambient. A plastic wrapper is placed over this case which shows us the specifications and the terminals of the battery. Note: The positive terminal does not mean the cathode. But generally, both these terms are used interchangeably while discussing battery terminals. Actually, the cathode is present inside the battery, while the positive terminal of the battery lies outside and is visible to us. The anode has the capacity to release electrons. Alkaline batteries use zinc as the anode. This metal easily releases electrons. The zinc is mixed with potassium hydroxidesolution to form a paste. Similar to the cathode, the anode also lies inside the battery, while the negative terminal lies outside. The negative terminal connects the anode to the circuit. In an alkaline battery, the negative terminal is the base cap at the other end of the battery. It appears as a. The cathode accepts the electrons released by the anode. Manganese dioxide is used in alkaline batteries as its cathode. Manganese oxide is mixed with graphite to increase its.
