Dead cell in the battery or something is on pulling power from the battery. If it is a dead cell the battery must be replaced.
If the alternator is installed incorrectly, yes, it can drain the battery.
Yes it can.
Dead cell in the battery, any light on the car that is staying on, or a stuck relay.
The wrong spark plug wire(s) can cause engine problems including not running but won't drain the battery.
They wear out over time, there could be a parasitic drain on the electrical system, something might have been left on.
It might
no it doesn't Corrosion on the top of a car battery can allow electrical flow from one post to the other which will drain the battery.
A car battery in any car would drain due to a short in the electrical system.
Yes, bu very slowly. Will cause dead battery in about 1 month
Yes they could be cleaned and battery charged
If the ashtray light is not working it will not drain the battery.
You can get a car alarm that uses it's own battery so wont drain the car.