How to Test a Car Battery: 3 Easy Steps
That "slow crank" in the morning is a warning sign. If you're not sure your battery is about to fail, here are 3 simple ways to check it at home.
Step 1: The Headlight Test (No Tools)
This is the easiest check. Before you start the car, turn your headlights on (not the dim "daytime" lights).
- Good Battery: The lights will be bright and strong.
- Failing Battery: The lights will look dim and yellowish.
- The Real Test: Now, try to start the car. If the lights dim significantly (almost turn off) while cranking, your battery is struggling to provide enough power.
Step 2: The Age Test
A car battery is a consumable item. In South Africa, the average lifespan is 3-5 years. Find the date sticker on your battery. If it's older than 4 years, it's living on borrowed time and should be tested professionally, even if it seems okay.
Step 3: The Pro Test (The Only One That Matters)
The home tests are just hints. The only way to know for sure is a digital load test. This test measures the Cold Cranking Amps (CCA) and internal resistance, giving a true picture of the battery's health.
"Don't wait until you're stranded. Drive to Alberton Battery Mart in New Redruth. We will run a 100% free, professional digital load test while you wait. It's fast, accurate, and gives you total peace of mind."
Quick answers
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How fast can Alberton Battery Mart replace my battery?
Most callouts in Alberton, New Redruth, and Meyersdal wrap in 60 minutes. We run Midtronics diagnostics first, then fit your Willard or Exide battery on-site so you avoid towing.
Do you handle Start/Stop and coding?
Yes. We stock AGM/EFB batteries and register them to the vehicle’s BMS before handover, preventing charging faults on BMW, Mercedes, Audi, Ford Ranger, and other Start/Stop platforms.
Can you test my current battery before I buy?
We offer free battery, alternator, and starter testing in-store or as part of the mobile callout. You only pay once we’ve proven the battery is the failure point.