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  1. Galvanic (or Voltaic) cells produce electricity by chemical reactions. What most people call a battery is one example, though a battery is actually more than one cell connected together. Sometimes a cell consists of two half cells joined by a salt bridge. This can be used to measure reduction and oxidation potentials.

    Electrolytic cells consume electricity to produce reactions. They are mainly used to decompose substances using electricity, as in electroplating, metal refineries.

    The construction of an electrolytic cell and a galvanic cell can be similar, in that they both have a container, electrolyte, anode and cathode. The way they are used is different.

Whats the difference between a galvanic cell and an electrolytic cell?

and what type are most batteries, for example a AA or a car battery.