A conductance tester measures the battery condition by _____.

A conductance tester measures the battery condition by checking the internal resistance. This method allows the tester to assess the health of the battery more accurately than simply measuring the voltage. The Internal resistance of a battery increases as it ages or deteriorates and can indicate how well the battery can deliver power.

By measuring how easily current can flow through the battery, the conductance tester provides information about the battery's ability to perform under load. High internal resistance suggests that the battery may have lost capacity or is nearing the end of its life. This technique is particularly useful because it can reveal issues even when the battery voltage appears normal, providing a more comprehensive evaluation of battery health.

Other methods, such as measuring voltage, only give a snapshot of the battery's condition at that moment and may not reflect its actual performance under load. Analyzing temperature and measuring electrolyte levels are also not typically used by conductance testers to assess the overall health of a battery.