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Your car battery can self-discharge on the basis of chemical reaction, or due to temperature changes (when it gets colder, it has less amperage available). It can also be caused by parasitic draw due to a improper connection or a device left on. Typically if the electrical system has been evaluated and there is no parasitic power-off draw, then the battery's chemical composition may have been compromised or a cell may have been crossed. This means your battery is bad and typically needs to be replaced.
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∙ 13y ago
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What causes a car battery to self discharge?
Either there is a dead cell in the battery or something is drawing power from the battery. Even a good battery will slowly discharge over time. Normally it will take months.
How can I overcome battery self discharge?
Use a battery maintainer.
How long does it take to carode a batterie on concrete?
Car batteries do not usually corrode just sitting on concrete unless their is a leak in the container. I do know that you shouldn't place a car battery on a concrete surface as it can cause the battery to discharge its self into the concrete and you end up with a dead battery.
Can a car battery over charge it self in the car?
Sure, if the alternator voltage regulator is defective it can overcharge the battery.
Can start the diesel car by pushing manually if battery discharge?
Yes, you can start diesel engine even if you don't have battery in!
Do car batteries recharge as their used?
No, they discharge. The alternator recharges the battery when the engine is running.
What happens if a car battery is not used for a long time?
If a car battery is not used for a long time, it can experience several issues due to a process called self-discharge and other factors. Here are some potential problems that may arise: Self-Discharge: All batteries, including car batteries, naturally lose their charge over time, even when not in use. This is known as self-discharge. The rate of self-discharge depends on various factors, including the battery type and temperature. If the self-discharge is significant and the car is not used for an extended period, the battery may drain completely. Sulfation: When a lead-acid battery, common in many cars, is left in a discharged state for a long time, sulfur crystals can form on the lead plates inside the battery. This process is known as sulfation, and it can reduce the battery's ability to hold a charge. In severe cases, sulfation may lead to permanent damage. Low Voltage: If the battery voltage drops too low, it can affect the performance and lifespan of the battery. Modern vehicles with advanced electronic systems may experience issues or malfunctions when the battery voltage is too low. Freezing: In cold climates, a partially discharged battery is more susceptible to freezing. When the electrolyte inside the battery freezes, it can cause internal damage and reduce the battery's effectiveness. To prevent these issues, it's advisable to take certain precautions if you know the car won't be used for an extended period: Keep it Charged: If possible, use a battery maintainer or trickle charger to keep the battery charged. These devices supply a low current to the battery, preventing self-discharge and maintaining an optimal charge level. Disconnect the Battery: If you're not using the car for an extended period, consider disconnecting the battery to prevent any slow discharge due to the vehicle's electrical systems. Store in a Controlled Environment: If feasible, store the vehicle in a cool, dry place. Extreme temperatures, whether hot or cold, can accelerate the self-discharge process. By taking these precautions, you can help ensure that your car battery remains in good condition, even if the vehicle is not used for an extended period.
What is meant by battery float charge?
The voltage required to counteract the self discharge of the battery at a certain temperature.So it is the amount of voltage given to make the battery in fully charged condition.
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What is making your battery drain when the car is off?
First thing is the battery itself. It it has a dead cell it will self-discharge overnight. So have the battery tested to make sure it is good. Secondly is that there is something on pulling power from the battery. Dome, under hood, glove box, trunk, or curtorsey light. You can also have a relay that is sticking.
Can a bad alternator drain a good battery?
It doesn't actually drain the battery, but without a working alternator to recharge the battery it will only discharge as the car is operated.
How 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.
