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There are a few reasons why a car battery might not hold a charge. One is that the battery has gone bad, and needs to be replaced. If you have any basic skills, you can buy a car battery at an auto supply store, and install it yourself (being careful to get the positive and negative wires hooked up correctly).
Second is that the wires leading from the Alternator to the battery or the battery posts and clamps could be corroded, and not making good electrical contact. If you notice corrosion, you can remove the clamps, clean them and the posts with a wire brush and wipe clean with a dry cloth, then replace them. If the battery is dead, it might require a charge from a charging device, or a boost from jumper cables to another vehicle to get the car started. Then you can let the car run and see if the battery holds the charge after that.
The third reason, and most likely is that the Alternator is bad, and is not sending a charge to the battery. You can have a mechanic at a reputable auto repair shop or dealership test the alternator, and if it is bad, you can usually buy a new alternator, or a rebuilt one at a lower price.
[Also: if your car is not starting, be sure it is because of the battery. It could be that the starter or starter solenoid has gone bad. Other electrical or fuel problems might be the cause as well.]
What else can I help you with?
Will A Car Battery Hold its Charge If not in a Car?
Yes, it will hold it's charge for at least 6 months in storage if it is a very good battery to start with.
If a car has not been started in a week or so why did the battery die?
Battery is getting old and will not hold a charge or there is a drain on it. Battery is getting old and will not hold a charge or there is a drain on it.
How does a dead cell effect the car battery?
If it has a dead cell the battery will not hold a charge and must be replaced.
Is it possible to clean the plates on the inside of a car battery to make it hold a charge?
no
Why car battery will not hold a charge?
The most common reason is one of the cells in the battery is bad and the only thing to do is get a new battery
How long new 12v battery for car can be store without charge?
A good auto battery will hold it's charge for at least 6 months or longer.
Car battery does not hold charge in cold?
The cold weather slows down the chemical reaction that goes on inside the battery.
What can make a car battery die when running?
It sounds like the alternator is bad. If the alternator is bad the battery will not hold charge when running
My 1987 Lincoln town car has a problem with the charge system. it runs but doesnt charge the battery it just drains it if its parked and idling. bought the car for 500 and this is the only problem.?
One of three things: 1) The battery has a dead cell and will not hold a charge - have the battery checked free at a local AutoZone or similar auto parts store. 2) The alternator and/or components is/are faulty and will not provide a charge - have the alternator checked free of charge (same place as above). 3) The belt is loose or worn - if loose, tighten; if worn, replace.
When you jump your car and turn it off the car is dead?
Either the alternator is not providing a charge to the battery, or the battery has a dead cell and won't hold a charge. There are auto parts stores (AutoZone, Advance, O'Reilly's) that will check batteries and/or alternators free of charge.
How do you know if your altinater as gone in your car?
If your battery doesn't hold a charge while running then your alternator is bad
How many amps do you need to charge a car battery?
To charge a car battery you need aproximatly 8000 amps To charge a car battery you need aproximatly 8000 amps
