Check for a loose ground.
Idle air control? Fuel pump? Coil?
It could be two things. As you know, the alternator charges the battery so it will not drain. If the alternator is not working properly to charge the battery, the battery will continuously drain. Have the alternator tested at your local Auto Parts store (NAPA or Advance Auto) If it is good, have the battery checked.
Weak battery or starter.
The battery "starts" the car...after that the alternator keeps the battery charged. They work together in other words.
The battery will run down and he engine will stop. You will not be able to start the engine. The alternator keeps the battery fully charged.
Possibly a bad alternator. The Alternator charges the battery when the vehicle is running. If the battery is not being charged this could cause the vehicle not to start.
The alternator is part of the electrical system. It is what charges the battery and keeps it charged.
Have the charging system checked. Possibly loose or corroded wiring, a loose alternator belt, or a bad alternator.
The alternator does. It is what keeps your battery charged while in use.
Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alternator belt. If the battery and alt test ok than check the connections to the alternator and battery. You may also have a battery drain (something that is staying on and killing the battery)
If the engine is running, then no. The alternator constantly keeps the battery charged.
Yes, as long as the engine is running, so is the alternator. The alternator is actually what keeps the car battery charged.