Load Test

A battery which has a state-of-charge of 75% or greater or has a "good" built-in hydrometer indication may be load tested.

With a battery load tester properly installed, load the battery for 15 seconds to one of the following:

• One-half (1/2) the CCA (Cold Cranking Amps).
• Three (3) times the AH Rating (Amp Hour Rating).

The voltage on a good battery will NOT  drop below 9.7 volts during the battery load test. After the load is removed, wait 5 minutes, the battery should bounce back to 50% or greater state-of-charge. If a battery drops below 9.7 volts during the load test, does not bounce back or fails to start the engine, the battery should be replaced. Batteries which pass this test should be recharged to restore peak performance.

Load Test Conditions 

Tests assume electrolyte temperature of 80° F, 26.7° C.

If the electrolyte temperature is above 80° F add .1 volt for every 10 degrees up to 100°.

If the temperature is below 80° F subtract .1 volt for every 10 degrees to 40°.