The principle is the same as LG cell-line but using mercury (II) oxide (HgO) instead of manganese (IV) oxide (MnO 2) into smaller cells predominate in a hearing for the deaf person, or other devices, such as spent on wrist watch calculator. This cell, electric potential of approximately 1.3 volts, a low voltage electric potential, but it can be a constant value throughout the lifetime of chemical reaction is as follows:
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