What Should the battery be at before performing a load test?
How Do You Perform A Load Test? To pass a load test, the battery must maintain 9.6 volts at 15 seconds when tested at one-half the CCA rating and 70°F (or above). This test must be done with a true load (carbon pile) and not one of the hand-held testers that work off a conductance algorithm.
How often should you load test a battery?
twice per year
Most manufacturers recommend that you get your battery tested at least twice per year. In areas with cold winters, you should test your car battery in late fall and again in late spring, since extreme hot and cold weather are the most common things that wear your car battery down.
Will AutoZone load test battery?
Free Battery Testing and Charging Battery tests are fast, accurate, and available at every AutoZone in the US.
What happens when battery does not pass load test?
If the battery has not passed the load test, remove the load, wait ten minutes, and measure the state-of-charge. If the battery bounces back to less than 75 percent state-of-charge (1.225 specific gravity or 12.45 VDC), then recharge the battery and load test again.
What should battery voltage be before load test?
That’s one of the drawbacks of a traditional load test – for accurate results, the battery must be at or above 12.45 volts (75% charged) before it is load tested – otherwise it may fail the test. Another way to check the battery is with a small handheld electronic load tester.
What’s the best way to test a battery?
Use a battery load tester and apply the same load as half the CCA battery rating for 15 seconds. It’s the recommended method. By using a battery load tester, apply a similar load as half the auto’s CCA specification for 15 seconds. Stop the ignition and use the starter motor to switch on the engine for 15 seconds.
When do you know your battery is bad?
If it’s sealed one, replace the battery. Whenever the state-of-charge is smaller than 75% using a voltage test, specific gravity or the built-in hydrometer shows dark or white “bad,” recharge the battery before proceeding. Replace your battery in one or more instances below:
What should I do if my battery fails the load test?
If the battery bounces back to less than 75 percent state-of-charge (1.225 specific gravity or 12.45 VDC), then recharge the battery and load test again. If the battery fails the load test a second time or bounces back to less than 75 percent state-of-charge, then replace the battery because it lacks the necessary CCA capacity.
If it’s sealed one, replace the battery. Whenever the state-of-charge is smaller than 75% using a voltage test, specific gravity or the built-in hydrometer shows dark or white “bad,” recharge the battery before proceeding. Replace your battery in one or more instances below:
Use a battery load tester and apply the same load as half the CCA battery rating for 15 seconds. It’s the recommended method. By using a battery load tester, apply a similar load as half the auto’s CCA specification for 15 seconds. Stop the ignition and use the starter motor to switch on the engine for 15 seconds.
Can you test the gravity of a closed battery?
You cant test the specific gravity of the closed battery, and thats a drawback. If its a gel deep cycle battery it is probably OK, they are designed to be recharged afetr full discharge hundreds of times. Sounds like you may still have a phantom or parasitic load going on. Use a ampmeter to tell.