What does a battery load test determine?

What does a battery load test determine?

Battery load testing involves measuring the amperes produced by a charged battery and is particularly relevant for vehicle batteries. The battery in a car or truck needs to produce high amperes to power the starter motor and turn the vehicle's engine.

What does it mean when a battery fails a load test?

If the battery begins to hold and then steadily declines, there is a problem. If the voltage drops to 0 volts, there is a problem. … This gives you a false indication of a true voltage reading. Batteries with open cells may read fully charged in idle, but they fail under a load test.

What should a 12v battery read under load?

Fully charged automotive batteries should measure at 12.6 volts or above. When the engine is running, this measurement should be 13.7 to 14.7 volts. If you don't have a multimeter to tell you the voltage of your battery, you can do a test of your electrical system by starting the car and turning on the headlights.