Question

how we use electrochemistry in mobile cell.

Answer 1

It is used to calculate the maximum possible electrical energy that could be obtained from a chemical reaction. ... A spontaneous electrochemical reaction (change in Gibbs free energy less than zero) can be used to generate an electric current in electrochemical cells. This is the basis of all batteries and fuel cells.

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Answer 2

keeping it basic
electrochemistry means that the chemicals in the battery does reaction and convert it into following electrons which becomes source of energy
when this reaction end we make sure that it keeps going on thus we have to charge if u have got ur &satisfied mark me brainliest