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.

Press the load test switch and leave it on for about 10 seconds. If the tester reads 9.5 volts or lower, your battery is bad and needs to be replaced.

Follow a Calibration Schedule Your battery tester contains a charger (source), discharger (load), voltmeter to measure battery voltage, and an ammeter to measure battery current.

When your car doesn’t start, often the battery is the culprit. Unfortunately, most vehicle owners do not check their battery until it fails. As preventative maintenance, the suggested best practice is ...

To maximize deep cycle battery life without sacrificing machine functionality, use good charging practices, proper testing procedures and equipment, regularly water flooded lead acid batteries ...

All workshop presentation materials and meeting minutes will be posted on this site by November 28. The final test procedure and a summary of posted comments will appear by line February 15.

If you regularly travel over rough roads or terrain, a periodic check of the battery’s hold-down and straps isn’t a bad idea. Battery replacement in an internal-combustion vehicle Photo by Getty ...