The power from a battery comes from the chemical reaction between the electrolytes and the electrodes. However, over a long period of time, the chemical reaction will slow down due to rust and corrosion inside the electrodes. As the chemical reaction slows down, the internal resistance of the battery increases.
Description
Specification
Battery Impedance Testing is an internal resistance test. In the DC Battery Systems, the impedance indicates the general condition of the batteries that is tested without stressing the whole system and the batteries themselves.