Answer :
When a battery is recharged, an electric charger runs current backward through the battery and reverses the chemical reactions.
During recharging the battery acts as an electrolytic cell converting electrical energy into chemical energy. The cell processes in a battery are spontaneous when it is being discharged, but they are not spontaneous when it is being recharged.
The term charged battery refers to a secondary or rechargeable battery in which the electron flow has been reversed, restoring the initial excess of electrons in the anode. Depending on the chemicals employed in the battery, it may or may not be possible to reverse this reaction.
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