3 Signs of a Failing Alternator (vs. a Dead Battery)
It's the most common and expensive mistake we see. A customer buys a brand-new battery, and two weeks later, they're stranded again. They didn't have a battery problem; they had an alternator problem.
The battery *starts* the car, but the **alternator** *runs* the car and recharges the battery. If your alternator fails, your battery will go flat, no matter how new it is.
Sign 1: Dimming Lights & Weird Electronics
Your alternator powers all your car's electronics. If it's failing, it can't keep up. You'll notice your headlights and dashboard lights start to dim, especially when you're idling. Your radio might cut out, or your electric windows might be slow.
Sign 2: The Battery Warning Light is On
This is the most obvious sign. That little red battery icon on your dashboard does not mean your battery is bad. It means your car's **charging system** is failing. 99% of the time, this is a faulty alternator. Do not ignore this light!
Sign 3: Your Car Dies *While Driving*
A dead battery will stop you from *starting* your car. A dead alternator will make your car die *while it's running*. If your car stutters and cuts out on the road, it's almost certainly a failing alternator that could no longer provide spark or power the fuel pump.
"Don't guess. Before you buy a new battery, drive to Alberton Battery Mart. We will run a **100% FREE, no-obligation diagnostic test** on your entire starting system—the battery, the starter, and the alternator. We will tell you *exactly* what the problem is."
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.