battery was sulfated in tests with another partially discharged battery soc 40 the reliable temperature limit was shown to be higher than 35 u00b0 c the ambient temperature of the battery during this test was only 20 u00b0 c which meant the car could not be started without charging indeed the power output of the battery was lower than the power required by the load at 20 u00b0 c the capacity of the battery in example 1 was determined through a test cycle by the monitor the battery capacity determined by the monitor compared well with the battery manufacturer 39 s data the monitor advised to change the battery when it detected half or less of the original capacity under fully charged condition high internal resistance twice the initial internal resistance at 25 u00b0 c and high reliable temperature limit when no other problem regarding the battery is detected an old battery with known mismatched cells was connected to the battery status monitor and subjected to a test cycle the monitor detected the presence of mismatched cells and displayed a warning indicating the same and advised to change the battery the automotive battery in example 1 was connected to the monitor and the starter switch in the simulation electrical circuit was switched on the monitor.