Electrolysis and Storage Batteries
It is noticed that during discharging the following does not happen

both anode and cathode become PbS04
voltage of the cell decreases
the cell absorbs energy
specific gravity of H2SO4 decreases

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Electrolysis and Storage Batteries
Life of the batteries is in the following ascending order.

Lead-acid cell, Nickel-cadmium cell, Edison cell
Lead-acid cell, Edison cell, Nickel cadmium cell
Edison cell, Nickel-cadmium cell, lead-acid cell
Nickel-cadmium cell, Edison cell, lead-acid cell

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