What is corrosion in battery? All Questions › Category: Battery Management System › What is corrosion in battery? 0 Vote Up Vote Down chetan shidling asked 5 years ago I need short information. 1 Answers 0 Vote Up Vote Down chetan shidling answered 5 years ago The undesired chemical reaction with environment is called corrosion. It consumes some of the active chemicals in the cell which leads to increase in impedance and capacity loss.