Internal resistance provides a measurement that is special with a remedy. The conductivity measurement is a patent that is a quick and reliable statement for the remaining capacity and the battery performance can be made. The time-consuming discharge tests are significantly reduced in number that also meets the demand for maintenance reduced costs.
An indirect method is used for the conductivity test so that the capacity of a cell or block can be assessed. The absolute value of the conductivity is decisive but the conductivity that is related is also the reference value, changing over the operating time.