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I have a 2012 Hyundai Azera. Every year I have to replace the battery because the battery will run down and the car will not start. ( I buy a brand new battery) When I try to start it, the dashboard lights flash on and off and car makes a click sound. I have had 3 mechanics at the dealership look at it and they can never find anything wrong with it. They hook it up to-do a diagnostic test and find nothing. They replace the battery and it starts right up. It happens every year at the same time every year. ( In Sept) Just wondered if anyone else has had this problem with their Azera....
 

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Your battery usually goes bad because of one of two things. Either the alternator is not putting out the correct voltage or there is a "parasitic" draw of current that is draining the battery when the car is turned off. Another thing that can affect battery life is if you don't drive long enough trips to charge the battery to restore what it took to crank the car. My original battery lasted 4 1/2 years, about what I would expect. I keep track of battery health with a battery analyzer that gives me the current state of charge and the current CCA capacity. It also can test the cranking and charging systems. The one I use is available at Amazon at https://www.amazon.com/ANCEL-BA101-Professional-Automotive-Motorcycle/dp/B01M0ARG3X/ If it reports that my battery is not fully charged due to short trips, I use a "smart" charger to bring the battery back to full charge. Then I re-run the test.

I can't attest as to how well the 3 mechanics diagnosed your car. Many simply attach a diagnostic tool and read the results. Did they monitor charginig voltage long enough to rule out an intermittent problem? Did they test for parasitic draw? Did they rule out any problems with your starter drawing too much current? A battery should not only last one year. Something is not working correctly. Hopefully, until they find the problem, you have a battery with a 3-year free replacement warranty and are not having to pay for a new one each year.
 

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I have a 2012 Hyundai Azera. Every year I have to replace the battery because the battery will run down and the car will not start. ( I buy a brand new battery) When I try to start it, the dashboard lights flash on and off and car makes a click sound. I have had 3 mechanics at the dealership look at it and they can never find anything wrong with it. They hook it up to-do a diagnostic test and find nothing. They replace the battery and it starts right up. It happens every year at the same time every year. ( In Sept) Just wondered if anyone else has had this problem with their Azera....
I am having the exact same problem but now the battery draining sooner after 60 days of a new one
 

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Your battery usually goes bad because of one of two things. Either the alternator is not putting out the correct voltage or there is a "parasitic" draw of current that is draining the battery when the car is turned off. Another thing that can affect battery life is if you don't drive long enough trips to charge the battery to restore what it took to crank the car. My original battery lasted 4 1/2 years, about what I would expect. I keep track of battery health with a battery analyzer that gives me the current state of charge and the current CCA capacity. It also can test the cranking and charging systems. The one I use is available at Amazon at https://www.amazon.com/ANCEL-BA101-Professional-Automotive-Motorcycle/dp/B01M0ARG3X/ If it reports that my battery is not fully charged due to short trips, I use a "smart" charger to bring the battery back to full charge. Then I re-run the test.

I can't attest as to how well the 3 mechanics diagnosed your car. Many simply attach a diagnostic tool and read the results. Did they monitor charginig voltage long enough to rule out an intermittent problem? Did they test for parasitic draw? Did they rule out any problems with your starter drawing too much current? A battery should not only last one year. Something is not working correctly. Hopefully, until they find the problem, you have a battery with a 3-year free replacement warranty and are not having to pay for a new one each year.
I am having an issue with my battery drain after few hours of sitting I am calling the dealership to have them check it out what do you recommendI have them do when I took to them before they kept replacing battery
 

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After testing to be sure the battery is fully charged and the starting and charging circuits of your car are okay, they should do a parasitic current draw test. That involves hooking an ammeter (meter that measures current) in series with your battery and letting the car sit long enough for all circuits to go into sleep mode. Generally, you would expect to see only about 30ma of current draw when the car is asleep. If you see more than that, you then measure the voltage across each fuse and use a chart to compute the current that is flowing across that fuse. This is a better method than just pulling each fuse to see when the high parasitic draw goes away because there are many interactive circuits in a modern car and disabling one may change the current draw of another. Here are two YouTube videos that show the process:
and
 

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I had this exact problem on my 2012 Azera. I replaced the battery two times and I ended up getting a trickle charger. Admittedly, I didn't drive the car more than 30 miles a week on average, so it sat in the garage and this was the assumed reason the battery died. But when we started to need the car more (wife got a jib) it died twice in the first week and we were driving 15 miles a day. I decided to trade the car in and got a good trade in value.
Loved that car, but couldn't have it be a commuter vehicle and unreliable.
 
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