Apply the load as specified by the tester for 15 seconds, or as specified by the load tester manufacturer. A good battery should maintain voltage above a specified level during the test.

Learn more on how to test a car battery with a Multimeter. Our team of experts prepared the guide on everything you need to know about testing a car battery.

A battery load tester can perform all kinds of analysis, from warning you of low charge to identifying potential faults in your alternator. Regularly checking your battery highlights problems befor… ...

A battery load tester can perform all kinds of analysis, from warning you of low charge to identifying potential faults in your alternator. Regularly checking your battery highlights problems befor… ...

A battery load tester can perform all kinds of analysis, from warning you of low charge to identifying potential faults in your alternator. Regularly checking your battery highlights problems befor… ...

A battery load tester can perform all kinds of analysis, from warning you of low charge to identifying potential faults in your alternator. Regularly checking your battery highlights problems befor… ...

A battery load tester can perform all kinds of analysis, from warning you of low charge to identifying potential faults in your alternator. Regularly checking your battery highlights problems befor… ...

Learn why battery diagnostics testing is essential for accurate vehicle repairs and how to check battery performance under ...

We test and review what we think is the best car battery tester, plus other options at different price points at AutoGuide.com.

That’s compared to smaller computerized hand-held battery testers that briefly load a battery, then use algorithms to calculate and estimate the battery’s capacity.