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.
Your alternator is probably not keeping the battery charged while the car is running. You need a new alternator!!
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.
No , just when the engine is running
It will do no harm.
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.
The alternator - it provides a charge to the battery while the engine is 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.
No. The alternator has to be turning to produce the charging voltage. It only turns when the engine is running.
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.
the car battery. the alternator while running
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 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