Batteries are made of five basic components:
1. A container made of plastic: PP or ABS.
2. Positive and negative internal plates made of lead.
3. Separators made of porous synthetic material.
4. Electrolyte, a dilute solution of sulphuric acid and water better known as battery fluid.
5. Lead terminals, the connection point between the battery and whatever it powers.
The manufacturing process begins with the production of a plastic container and cover. Most automotive battery containers and their covers are made of polypropylene. For a typical 12-volt car battery, the case is divided into six sections, or cells, shaped somewhat like one row in an ice-cube tray. The cover will be sealed to the top of the container when the battery is finished.