No, a bad coil will not drain the battery.
Your starter is incapable of being drained. It is an electric motor. However a bad starter can drain your battery
Bad battery or a parasitic drain
Yes, because a bad coil will not allow the engine to run. But if the engine is running then the coil has nothing to do with the alternator charging the battery.
Yes
no
No.
yes
It doesn't actually drain the battery, but without a working alternator to recharge the battery it will only discharge as the car is operated.
You have a bad cell in the battery and a bad cell will drain the other cells. get another battery
YES!My version:A bad relay switch that goes bad can "stick" in the on position and leave what ever it powers on and drain the battery You should be able to see the item that is on.
Highly unlikely.
No, a bad ground will not drain the battery. A dead cell in the battery will most certainly drain it. If it has a dead cell it must be replaced. Also any light that is on will drain it. Lastly a stuck relay will run it down.