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You may also notice that the interior lights flicker and go dimmer than usual when you are turning over the engine. It sounds like the starter motor is “lazy” and not as eager to turn over your engine. If your battery has low capacity you may notice that when you are starting the car, the engine turns over slower than before, even if the battery is fully charged. When the battery is failing, it loses its capacity, meaning it can hold less charge than when it was new. Is there a way to tell that the battery is failing? Not always, but there are some telltale signs. Is there a way to tell your car battery is failing ? Therefore, problems with your vehicle’s charging system can also cause the battery to fail prematurely. The battery lasts longer when it’s kept fully charged, although overcharging can also damage it. If the vehicle is parked for extended periods of time without starting, the battery will need to be replaced sooner. Usually the battery lasts longer if the vehicle is driven daily. How long can it last? An average car battery lasts from 2 to 4 years. At some point, the capacity will drop so low that the battery won’t be able to start your car. Most cars have lead-acid batteries that are made of six cells with lead and lead-oxide plates filled with an electrolyte (dilute sulfuric acid). Over time, a lead-acid battery loses some of its capacity, mostly due to sulfation.
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At some point, the car battery needs to be replaced, but when? Is there a way to tell that the car battery is failing? How long does it last? Let’s start with why the battery needs to be replaced. The car battery is what powers every electrical component in a car.