Today’s report from Triangle Auto Service is on car batteries, why they die and what we can do to lengthen their life.  Most of us have had a dead car battery at one time or another.  In fact, it would be very unusual if you hadn’t.  You may be surprised to learn that only 30 percent of Chicago car batteries last for 48 months.

Car Battery

Now that’s an average.  How long a car battery lasts depends on many factors. You may not know that one of the biggest factors is the temperature where you live and drive around Chicago.  You might suppose that cold weather was harder on car batteries because it takes more power to crank a cold engine, but the opposite is actually true.
For more information on your car battery, please visit us:
Triangle Auto Service
4060 N. Elston
Chicago, Illinois 60618
Car batteries in very cold climates have a life expectancy of 51 months as opposed to 30 months in very warm climates.  The reason is simple: car batteries are chemically more active when they’re hot than when they’re cold.

Car battery

Car battery

A car battery will actually start to discharge on its own within 24 hours in hot weather.  It takes several days in cold weather.  When car batteries are left too long in a state of partial discharge, the discharged portion of the battery plates actually, for the lack of a better word, ‘die’. Recharging the  battery will not restore the dead part of the battery plate.
One of the big problems for the way most of us drive in the Chicago area, is that our  batteries are often partially discharged.  The biggest job the battery does is to start the car.  It takes some time for the alternator to recharge the car battery after starting.  If you’re driving short distances, especially if there are several starts and stops, your  battery may not fully recharge.
Another issue is that vehicles are coming equipped with more and more electricity hungry accessories like navigation systems, DVD players, CD and MP3 players, heated seats, heated steering wheels and so on.   We often plug in cell phones, computers and other gadgets.  Combine that with short trips and it’s no wonder that our batteries are partially discharged.
Experts say we can extend our battery life by topping off the charge periodically using a good quality battery charger.  You may have heard these chargers referred to as ‘trickle chargers’.  They’re attached to the car battery and plugged into a wall outlet to slowly bring the car battery up to full charge.
Now there’s some science involved with how fast a car battery should be recharged.  If you buy a cheap manual charger, you’ll have to tend it. Frankly a learning curve on how to do it right and requires much attention.  A computer controlled charger – or smart charger – monitors the process and determines the appropriate rate of charge.  It even stops charging when it’s fully charged.  It costs more than the manual charger, but the automatic model is worth it.
The suggestion is to charge once a month in warm weather and once every three months in cold weather.

Automatic battery charger

Automatic Battery Charger

Another thing to avoid is deeply discharging your battery.  Something like running the headlights and stereo with the engine turned off. That will take months off the car battery life every time you do it.
Now, as we discussed, heat is hard on a car battery.  A dirty, greasy car battery holds more heat.  You can wipe off excess dirt with a paper towel or ask your service adviser at Triangle Auto Service to clean it for you.  Triangle Auto Service can even test your car battery and tell you if it’s time to replace it.

 Battery Chicago

Dirty Battery Chicago

Car batteries are fairly expensive, so taking a few steps to make them last longer is well worth it.  Of course, the  battery will eventually need to be replaced.  Always make sure you get a new car battery that meets the factory specifications for your vehicle.  If you feel you need more car battery capacity than what came with your vehicle, talk with your service adviser at Triangle Auto Service about appropriate upgrades.
If you have a dead car battery, be careful to inspect it before you jump start it. If the case is bulging, cracked or leaking, do not jump start it.  Damaged car batteries can explode or catch fire.  And deeply discharged car batteries can freeze.  Do not jump start a frozen car battery.