I want to know, when the charges travel from higher potential to lower potential of battery through the circuit then the potential difference must diminish. As it was previously made by keeping more charges at one terminal (positive) in comparison to other terminal (negative), and now electrons (charges) move from higher to lower, so either potential difference must diminish or the polarity of the battery must be changed.
closed as unclear what you're asking by Bill N, Alfred Centauri, Emilio Pisanty, Cosmas Zachos, AccidentalFourierTransform Jun 12 '18 at 19:44
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Thank u all...I was previously having misconception as I was not clearly aware of the reaction takes place inside the battery which the STEEVEN said..that brings new electrons to negative terminal.