Load Testing Your Battery

Use this same procedure for VRLA DRY CELL batteries and Flooded batteries:

1. Recharge if the open circuit voltage is below 75%.
2. If you have an adjustable load tester, set the load at 3 to 3.5 times the 20-hour rate.
3. Apply the load for 15 seconds. The voltage should stabilize above 9.6 volts while on load.
4. If the battery has a CCA rating, you can apply a load equal to ½ the rating for 15 seconds. The voltage should stabilize above 9.6 volts while on load.
5. To apply a more determined test, you may apply a load equal to 100% of the rated CCA or 5 to 6 times the 20-hour rate for 30 seconds. The voltage should stabilize above 7.2 volts while on
6. If below 9.6 volts (7.2 volts for the 100% CCA test), recharge and repeat the test. If below 9.6 volts (7.2 volts for the 100% CCA test) again, replace the battery.