PDF Questions & Answers Sheet
describes the ability of a battery to conduct current. It is a measurement
of the plate surface available in a battery for chemical reaction, which
determines how much power the battery can supply. High relative conductance
is a reliable indication of a healthy battery, while conductance declines as
the battery deteriorates. Years of laboratory and field test data have
determined that battery conductance is an indicator of battery state-of
health showing a linear correlation to a battery's timed-discharge capacity
test result. If conductance can be measured, discharge capacity can be
predicted, giving a reliable predictor of battery end-of-life. Other testing
alternatives like voltage and specific gravity testing are not predictive.
Timed discharge testing is very time-consuming and expensive, and impedance
testing does not correlate directly and linearly with discharge capacity.
Thus, conductance testing is a very effective and economical battery