it depens on the quality of the battery and the vehicle wont start after aproximaly 30 minutes
Yes, if your car sits a few days at a time and your cars interior lights periodically come on it will drain your battery.
mainly leaving your lights on when the engine is of or leaving the keys in the ignition
check the switch and make sure the lights are out. on the other hand could be a faulty interior light switch, somthing i have never seen
The head lights are the biggest long term drain on your battery. (The starter is a heavier drain, but you can't leave it on for very long.)
There is a possibility that your door is not closed properly. The hinges are prone to go bad, and your door will not close properly hence a battery drain by the interior lights. You could also have a bad battery
Yes, a loose battery cable will prevent the alternator from charging the battery. The drain on the battery is not caused by the engine not running unless an accessory is left on. Most likely, the drain is caused by accessories (radio, lights, etc) while the engine is running due to the battery not receiving its charge from the alternator and then not having enough charge left to start the engine.
Battery drain would depend on what else is on, for example headlights, courtesy lights, glove box light etcetra. If there is nothing electrical on then there should be no drain.
Can be the battery has a dead cell which will require the battery be replaced. Can also be anything on the vehicle that is on pulling from the battery. Any light that is on or any relay that is stuck will drain the battery. Check under hood light, trunk light, glovebox light, interior lights, etc.
Bad alternator and/or belt. Your battery isn't being re-charged while you run the engine, so the electrical things drain the reserve from the battery.
you drain your battery when you leave your lights on
A stuck relay in the car can drain the battery. A dead cell in the battery itself will drain the battery overnight. If this is the case the battery must be replaced as there is no way to fix it. To find out disconnect the negative battery cable for around 8 hours. If the battery goes dead it has a dead cell. If not then something is draining the battery. Anyplace that sells batteries can test the battery for you.
Something must be draining the battery while it is not running. Usually it is caused by an interior light being left on either inside or perhaps the trunk or one of the doors were not closed completely and thus causing the interior lights to stay on and drain the battery. Otherwise, this will continue and you should plan on replacing the alternater and/or battery