Posts Tagged: Test a car battery
Car Battery Tester Results Explained
Understanding Battery Test Results: What CCA, Internal Resistance, SOC, and SOH Mean Quick Summary When I test a car battery with a digital tester, I’m looking at three core things: state of charge, cranking ability (CCA), and internal resistance/conductance. A healthy battery will show strong Cold Cranking Amps (CCA), low internal resistance, and stable voltage under load. As a rule of thumb, internal resistance below 5 milliohms is excellent, 5–10 mΩ is acceptable, and anything higher usually means the battery is on borrowed time. For CCA, I expect the battery … Read More
How to Test a Car Battery: Measure Its State of Health (SOH)
Understanding Car Battery Testing: A Step-by-Step Guide Most DIYers check a car’s battery voltage to see if it’s in good shape. However, a voltage test alone doesn’t give you the full story of a battery’s condition; it only tells you its State of Charge (SOC). A modern battery tester, on the other hand, can tell you the battery’s State of Health (SOH), which is a much more accurate predictor of the battery’s overall condition. To measure SOH, you need a digital battery tester. How to test a car battery state … Read More