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How often should I replace my car battery?

Last week we tackled how often you should replace your windshield wiper blades so, naturally, we thought we would tackle the conundrum of how often to replace your car battery.  We found another great resource to share with you on the internet that we thought has a lot of value in it! 

When your car battery is behaving, it’s pretty much a silent partner.  It does its job and doesn’t demand very much attention.  This, of course, is when a battery is behaving.  When they get old they don’t have the oomph they used to have and they often misbehave. When that happens, the best thing to do is to replace them with a new battery before it leaves you stranded.  The question is: when?  When should a battery be replaced so it doesn’t let you down? Well, the answer to that question is that it “depends”.  A rough rule of thumb is a car battery lasts “about four maybe five years under normal conditions”.

But what are normal conditions?

“Normal conditions” consist of a number of factors that exist in theory but rarely seem to happen. Normal in this case means the battery goes through full charge cycles, isn’t subjected to extreme temperatures, is attached to a properly functioning charging system, and isn’t providing power for a ton of accessories. As you might imagine, normal just isn’t that common. In the real world, temperature extremes, vehicle vibration, short trips down the street and an ever-increasing array of electronic devices take a toll on a battery’s lifespan.

If you look at a typical lead-acid, maintenance-free car battery, it’s easy to make sense of why these factors affect a normal battery. Inside the plastic box are plates of heavy materials like lead and lead dioxide. The plates are suspended in a mix of water and sulfuric acid, which forms an electrolytic solution. A host of factors can disturb this chemical reaction and weaken the battery structure. Vibrations from rough travel or a poorly-secured battery can shake loose or damage the plates. Extreme heat speeds up the chemical reaction which can shorten battery life. Driving distances can affect the reaction, too. If you have a short commute or take lots of brief trips, the battery never gets fully charged. This constant state of undercharge results in “acid stratification”.
Signs that it may be time

 

The most obvious sign of a battery that is nearing the end is that when fully charged, it cranks the engine slowly.  However, because the battery is part of a larger system connected to other parts of the car, a slow cranking may indicate a deeper problem than simply no juice. If something else is going wrong in the electrical system — say, a weak alternator — a working battery may be providing less current than it should. A good mechanic can help check this for you. The battery itself provides other clues to whether it’s on its way out. The first is age. If the battery is older than three or four years, start expecting problems.

For the rest of this article and more great articles go to gearheads.org.  If you find yourself needing a new car battery, please contact us at All Tech Automotive.  We will get you back on the road in no time!

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