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Can be a dead cell in the battery which will fully discharge the battery over night. The battery must be replaced. Of course any battery will loose it's charge over a few months of storage.

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Q: Why does a car battery run down while its not running?
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When driving 97 ford explorer while accelerating car shuts down then battery clicks?

Your alternator is probably not keeping the battery charged while the car is running. You need a new alternator!!


Should your car stay running when you take the pos battery termanal off?

A battery is used to start a car. Once it is running, the alternator then supplies electrical energy to charge the battery as well as power the electrical systems in the car. Removing the battery while the car is running will not affect the running of the car.


Does an alternator charge a battery while the car is not running?

No , just when the engine is running


What if battery gets wet while car is running?

It will do no harm.


Why does my 1997 mercury tracer car battery light blinks on and off while the car is running?

If your 1997 Mercury Tracer has a battery light that blinks on and off while the car is running, it most likely means that the battery is not charging. This could be an issue with your alternator.


What does a vehicle depend on to keep it charged while the car is running?

The alternator - it provides a charge to the battery while the engine is running.


Why is the car battery charging at 14 volts running and 13.5 not running?

your alternator charges the battery while the car is running. The alternator actually puts out a higher voltage than 14 volts while it is running, but it is reduced by a voltage regulator (most of which are already built into the alternator housing), to prevent damage and premature death of the vehicles battery. While your car is not running, the alternator is not charging the battery, and the 13.5 volt reading you get is just the measurement of the voltage the battery is holding at that given point.


Can a car's alternator charge the battery while the car is not running?

No. The alternator has to be turning to produce the charging voltage. It only turns when the engine is running.


How do I recharge a car battery?

Car batteries recharge themselves while your car is running. However, if your battery is dead, you must jump the battery using a battery jumper box or jumper cables attached to another vehicles's battery.


Where does the electricity that is sent to the spark plug come from?

the car battery. the alternator while running


Would a bad alternator cause a car to die while driving?

If the alternator fails, it is no longer keeping the battery charged and your engine is running on nothing but battery power. Once the battery runs down, your engine will no longer run.


If a car's oil battery engine temperature and engine lights come on and then the car slows down and dies is it the car's alternator or is it the battery?

if you can start car pull off the neg battery cable if car stalls its the altinater if it stays running it might be the battery