Defective alternator or something is on pulling power from the battery. Can be any light or relay.
Every time you run an automobile battery down, you cut the life of the battery. These batteries are not designed to be run down. They are designed to hold a charge continuously. Run the battery down three or four times and you will ruin the battery.
If any light is on then overtime it will run the battery down. So will a stuck relay. In addition a dead cell in the battery will run it own overnight.
How does battery run down protection work on a 2009 CHEVY VEHICLES?
It won't. Look for a light that is on or a stuck relay. Also a dead cell in the battery will cause it to run down overnight.
Running a cooling tray off the battery will put an additional load on the battery causing it to run down faster
A loose battery cable can cause the battery to not be able to receive a charge from the alternator. This can run the battery down. Will it kill the battery? Yes and no. Draining the battery once will do very little harm but it will do some. Run it down a few times and you can ruin the battery. Auto batteries are designed to be kept charged and are not designed to be run down and recharged like a deep cell marine battery or golf cart battery.
why das my interior light stay on and run the battery down.
Assuming you never run it down it should last 3-5 years. But there is no guarantee and it can fail at any time. I had one that lasted 7 years and then again I had a new battery that only lasted 1 year. If you run the battery down you harm the battery and shorten it's life.
You can run a deep cycle battery completely dead without damaging the battery. They are designed to be run down.
As long as the battery is fully charged it will start no matter the condition of the alternator. Eventually the battery will run down if the alternator is not keeping it charged.
Dead cell in the battery or some light is on pulling power from the battery. A stuck relay can also run the battery down.
Taking energy out of it, i.e. using it to run stuff.