Dead Battery In My 2010 Elentra Se - Hyundai Forums : Hyundai Forum
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#1 Old 04-18-2010, 10:31 PM
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tommiez
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Returned from a 7 day train trip to find my 2-month old car with a dead battery. Nothing was plugged in and/or lights left on. Called Hyundai roadside assistance who jump started it and then I drove it around for an hour to build up the charge. I am perplexed as to why this has happened to a new battery. I may go to Hyundai service to test the battery and/or wait to see if it happens again. Thanks for your feedback.
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#2 Old 04-19-2010, 05:08 PM
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reubj
There is a "memory fuse" you should pull when the vehicle will not be operated for an extended period of time. Check owners manual for details.

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#3 Old 04-19-2010, 11:02 PM
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jeff3820
QUOTE (reubj @ Apr 19 2010, 03:08 PM)
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There is a "memory fuse" you should pull when the vehicle will not be operated for an extended period of time. Check owners manual for details.
7 days is not a long time. There was a current draw from somewhere or the battery is defective. Regardless, have the battery FULLY charged and checked...it might be defective. Just driving around will not fully charge the battery.
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#4 Old 04-20-2010, 12:11 AM
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tommiez
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Took my car to the dealer today to have battery checked out. They did a "load" check as well as a "battery drain" check and they said everything looks OK. So, still don't know what drained the battery. The service dept. then told me that newer vehicles cannot be stored for very long periods (over a week or so) because the computers drain the battery and that if I don't use the car for over a week I have to remove the memory fuse to disengage the battery. He also told me that each time I do this everything has to be reset, ie radio, clock, etc. - which is a nuisance.
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#5 Old 04-20-2010, 12:58 PM
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alanb is an unknown quantity at this point
I have let my '08 GLS sit for over 2 weeks without a problem. It seems to me that it would be a major design flaw for the electronics to drain the battery in so short a time as a week. So I hope the service technician who told you that is wrong. Hopefully some of the other knowledgable members in the forum will comment on this.

I have had my battery drain from the trunk being accidentally popped because of the poor key fob design (discussed in other threads in this forum). The trunk was ajar but not open, sitting in my garage for several days and the battery was completely drained. I have now removed the light bulb in the trunk to avoid this problem.
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#6 Old 04-20-2010, 08:36 PM
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jeff3820
QUOTE (tommiez @ Apr 19 2010, 10:11 PM)
Quote:
Took my car to the dealer today to have battery checked out. They did a "load" check as well as a "battery drain" check and they said everything looks OK. So, still don't know what drained the battery. The service dept. then told me that newer vehicles cannot be stored for very long periods (over a week or so) because the computers drain the battery and that if I don't use the car for over a week I have to remove the memory fuse to disengage the battery. He also told me that each time I do this everything has to be reset, ie radio, clock, etc. - which is a nuisance.
The dealer is full of BS. One week is NOT a long time... Did they charge the battery? A load test can only be run on a fully charged battery. Also, a load test only tests the health of the battery. Did they check to see how much current is being drawn when the car is off?

Our 2008 GLS has sat at the airport for 7+ days at least 5 times with no issues at all. Either you have a current drain (light accidently left on) or the battery is defective. You should not have to mess with the memory fuse for the small current draw of the idle computer for MONTHS. Try another dealer...
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#7 Old 04-21-2010, 02:50 AM
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tommiez
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I think you might be right - I have found my trunk ajar a couple times as well because of the design flaw in the remote system and this would definitely account for the battery drain and is something I would not notice. I might have to remove the bulb to avoid any future occurrence.
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#8 Old 04-21-2010, 11:41 AM
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samkent
Isn't there a light on the dash for the trunk? I don't know if it's LED or the old style bulb. The old style will draw a sizable amount ove the course of days.
Either way removing the bullb in the trunk may not be enough for 7 days.
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#9 Old 04-21-2010, 01:03 PM
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alanb is an unknown quantity at this point
That is a good point samkent. I don't think I have gone 7 days with a popped trunk lid since I removed the bulb ... probably gone 2 or 3 days and not had a problem. But I suppose there is some drain from the trunk warning light. I wish Hyundai would come up with a fix for the poor fob design.
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#10 Old 04-22-2010, 08:55 AM
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samkent
My problem is not the trunk popping it's the doors locking. I almost never lock the doors myself but the FOB does it for me in my pocket.
Just to compare my trunk button is the button closest to the keys and the door lock is farthest from the keys. (out of 3 buttons) This is odd since the panic button is on the opposite side of the trunk and it never gets activated.
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