So my book says that the batteries we have considered so far( Daniell cells) are low life span, because they reach equilibrium too fast. In the next paragraph, it says they are also made by irreversible reactions and we call them primary battery. I know that the reactants and products of Daniell cell reach equilibrium (Zn+Cu2+ <------> Zn2+ + Cu). How can one reaction reach equilibrium without being reversible?
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