You'll need an external power source (such as a battery charger or another car hooked to battery cables) in order to start your vehicle. A battery which is truly depleted - not just discharged - will not take a charge from the alternator, and will need to be replaced.
No, your battery supplies power to the starter. However if your alternator is defective then it will not supply power to the battery and the battery will soon be depleted.
Your car lost power while you were driving and it will not start now because the battery is depleted.
The electrical energy provides power. When the chemical energy is depleted, the battery will not longer generate electrical energy.
The car will then be unable to start.
A battery that has lost it's charge.
Nothing. The battery is sealed an no harm will be done.
it will arch out and melt the knobs on your battery and your cables
THE BATTERY WILL GO DEAD
they have to be recycled and they wont work.
You will shorten the life of the battery. Only add Distilled water to a battery.
CD player stereos do use a car's battery in about 15 hours. In reality, a car battery shouldn't be depleted by more than 20% as they are designed for high-current, short loads for the starter motor and to be kept charged up.
current flows from the negative to the positive cable and back into the battery cells, recombining with the element depleted of electrons that are flowing out the negative cable. The process is not 100% efficient and the battery will eventually cease producing current.