How a Battery Works
Anatomy of a Battery
1. Steel Can
Nickel-plated steel which is formed into a
container to hold chemicals; serves as the
positive collector.
2. Positive Pip
A formed protrusion in the bottom of the
battery can which identifies it as the positive
terminal.
3. Outer Jacket
A plastic sleeve which contains decorative
printing identifying the cell type and size.
4. Separator
Porous non-woven fibrous material which
separates electrodes; holds electrolyte
between electrodes.
5. Electrolyte
A solution of potassium hydroxide in water
which carries the ionic current inside the
battery.
6. Cathode
Manganese dioxide and graphite which take
up electrons from the external circuits.
7. Anode
Powdered zinc metal which serves as the
source of electrons.
8. Anode Collector
Tin-plated brass which serves as a path for
the electrons from the anode to the external
circuit.
9. Seal/Vent
Molded plastic disc which holds internal
components inside the cell and releases
internal pressure when battery is abused.
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