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Anonymous Posted on Aug 04, 2014

Battery keeps going dead - 2011 Hyundai Tucson

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  • Posted on Jan 10, 2016
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There is a charging design defect on Hyundai vehicles. Replace the alternator immediately as this defect may occur below 30,000 km of travel. Avoid using the USB charger while aircon, head lights, and radio are ON because the alternator ampere rating will get overloaded, and power will be drawn from the battery.

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Related Questions:

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1answer

New battery keeps going dead when car shut off overnight

Sounds like a slow drain - like a dome light or short in the wiring.
If the battery stays charged when it is disconnected, you'll have to check for a power drain in the car.
tip

Battery keeps dying for no reason:


Is your Battery good or bad?
Sometimes a battery seems ok then later it seems dead. sometimes it charges and then it won't take a charge. This keeps going on and doesn't really seem like the battery is bad. This is a common problem happening to everyone at times.
Could be a dead cell in the battery, try measuring each cell in the battery. If one cell is low it will seem like a dead battery. But the battery really needs to be replaced. The debris in the bottom of the cell is intermittently shorting the cell.

Hope this helps.

on Apr 23, 2015 • Cars & Trucks
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you have a drain somewhere....check boot light or bonnet if you have one.Clean and tighten terminals.Most common is alternator diode but maybe something simpler.
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Does it go dead after sitting for a few hours? Once started and driven for several miles will it restart if the engine is shutoff? If the battery goes dead only after sitting for a while with the engine off, you probably have a bulb or some accessory that is draining the battery.
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Battery keeps going dead. Battery and alternator tested OK.

possibly a draw on something maybe a light stays on when you park it..? gloive box light ,door light could be a lot of things if you put a test light between the ground cable and the battery and hook up the positive battery cable ther should be very little to no light ifit is bright then you have someting drawing power
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because you are going back to a dealer
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With the engin not running and the key off, lift the hood and disconnect the positive lead on the battery. Then touch the lead back to positive terminal on the battery. If a spark is seen, there is something still on in the car. Could be the power mirror switch, seat heaters or even a car phone. Trial and error to find it.

Sorry I can't be more specific but that is the test.

Good luck.
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