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Even with everything off autos take a miniscule draw of power to maintain clock, radio settings and memory in ECU. Most will lose all this data in 20-30 minutes max if disconnected. Batteries also naturally lose some of their charge as they vent gases.

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Q: Why does a car battery go flat if a car is not used often?
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What does the battery do in a car?

if you leave any lights on in the car you may cause you a flat battery. if you leave any lights on in the car you may cause you a flat battery.


Why does a car battery go flat if the car is not used often?

Because Electricity can't be "Stored" as such, it is constant. So wether the car is unused or even something as simple as a mobile phone battery, the voltage is still constant, so it looses power slowly (of course). Until it inevitably "Goes flat" as you put it. - but its often that if any battery is left to long without use or charged. The "effectivness" of the battery begins to deteriate, so eventually. (After a Fairly long time) that battery would become unusableb indeffinetly, regardless of the user , atempting to charge it. In addition if the battery runs flat is just a couple of days then something is on drawing power from the battery or the battery has a dead cell.


Does the battery of a car not used for three months go flat?

Depending on its age and the ambient temperature, maybe, but not likely if it is a good battery to start with.


How often do you charge a car battery?

A car battery should not be "cycled" as in fully discharged and then recharged. Such a cycling would quickly destroy this kind of battery. A car battery is discharged slightly when you start your car, then it is recharged again when you drive your car. Proper charging whilst running car engine is good for the battery. A normal car-battery (Lead-acid) can last for many years if not "cycled". Never discharge battery more than 50%. How often you actually need to recharge your battery depends on how it is used.


What happens when a car battery is flat?

they have to be recycled and they wont work.


Battery in French?

Battery as in assault and ---- Aggression Battery as in my car's --- is flat Batterie My flashlight needs a new ---- Pile


Will it damage the car if I remove the flat battery and leave the car without battery for 2 weeks?

No, it will not damage the car at all, you will need to reprogram your radio when the new battery goes in though.


How do you tell if car alternator is bad?

The battery light will be illuminated on the dashboard and later the battery will go flat as it is not getting charged Garages can check this for you if your battery is frequently getting flat.


A battery acid with 9 letters?

That would be sulphuric acid, which is often used in car batteries.


Will a flat car battery damage the battery?

Yes...it will not have the same capacity afterwards. Yes. Everytime you run an auto battery down completely you shorten the life of the battery. It is not designed to be run flat as a deep cell battery is.


Why would a car battery keep dying?

A car battery would keep dying because inversely, the lesser the battery is used, the dying process continues. The more the battery is used, the lesser the dying process. But the dying commences and continues , the moment the car engine is not used. Thus, as often as the car is being used, the dying "resumes" the moment tne engine stops. And the faster it is used again, the slower the dying process.EVerytime the car engine is used, the battery recharges, thus life is given back to the battery. Once the engine stops, the dying resumes. This is why the car battery keeps on dying (everytime the car engine is not being used)


What is the most common problem in car?

Flat Battery and lost keys