Final answer:
Both Technician A and Technician B make correct assertions relating to conductance testing for batteries. Conductance tests measure internal resistance to detect bad cells and can sometimes be performed without a full charge.
Step-by-step explanation:
Regarding conductance testing in battery testers, both Technician A and Technician B are partially correct. Technician A says that conductance testers use an algorithm to indicate bad cells. This is true because conductance testers measure the internal resistance of the battery and use algorithms to interpret the results, indicating whether the cells are in good condition or not.
Technician B mentions that conductance testers eliminate the need to fully charge a battery before testing it. This statement is also accurate to some extent as these testers can measure the internal resistance without the need for a full charge. However, for certain types of tests and under specific circumstances, having a fully charged battery may be recommended to ensure accurate results.
Battery testers, such as those in Figure 21.13, use small load resistors to intentionally draw current for checking if the terminal voltage drops below an acceptable level. This is a primary indicator of the battery's health, as high internal resistance signifies a weak battery.