If you're sure the battery is ok (sometimes they can short out and draw down the charge) you might want to test the alternator to see if it has bad diodes.
Take the battery out - leave the battery cover off, and lay all the components over a warm heat source such as a radiator - preferably overnight.
Typically DC is what you get in a battery and AC is what powers your house.
you have a short in the a/c circuit somewhere
what are the three main components of a battery what does chemical enegryin a battery transform to
The 1937 Oldsmobile is negative ground.
Something is on draining your battery overnight. Any light or any relay. It can also be your battery has a dead cell draining it overnight.
It's typically either a discharged battery or a poor battery connection. Batteries are only an electrical storage device. If the alternator isn't keeping the battery adequately charged you could have the problem you describe. But rather than running right out and replacing the battery, first charge it and see if it will hold a charge overnight. Sometimes, if something is left on inside the car it will run the battery down sufficiently to cause what you describe. Other times it's the alternator, dirty battery terminal or even a worn out battery, but you can't know until you test these components.
Depends on the battery. Several hours to overnight.
This can occur due to a light remaining on or some other electric device is using energy from the battery. The electrical system must be evaluated to determine the source of the parasitic draw. Typically however, if the source cannot be obtained, the battery is considered bad.
the battery is under the backseat
Underneath the back seat
Time to change the battery