Yes, that’s right! The batteries of your car can be drained by hazard lights. Once your hazard lights drain your battery completely, they are designed to use minimal power to buffer the drain on your battery.

Whether your headlamps are on or off, you can always flash your headlamps by pulling the stalk toward you and releasing it. In an emergency, press the hazard button to flash all of the turn signal lights. To turn them off, press the button again.

The time varies from overnight to an hour or less depending on the vehicle and the condition of the battery. In modern cars with LED lights, the warning lights should be able to run for many hours without discharging the battery to the point where it won’t crank the engine over.

It is very possible for your car battery to die if you leave it on for 4 hours, but it’s difficult to give exact numbers on how long your car battery will last. Some people can leave their lights on for 4 hours and it won’t die, some people come back to a dead battery if they’ve left it for that long.

Simply put, no car battery, whether healthy or dead, can charge itself. It always requires an external power source to get charged. Can Dead Batteries be Charged? Once a car battery is dead, the alternator will fail to recharge it completely.

Fines for idling Leaving your car idling is looked upon dimly by the law. The Highway Code clearly states: “You must not leave a vehicle’s engine running unnecessarily while that vehicle is stationary on a public road.”

While it is an offence to be parked with an engine running, in line with The Highway Code which says that ‘if the vehicle is stationary and is likely to remain so for more than a couple of minutes, you should apply the parking brake and switch off the engine to reduce emissions and noise pollution’, the RAC has …

Carbon Monoxide can turn deadly within minutes. So please don’t leave your car running in the garage. “Don’t ever warm-up a car in a garage, even with the garage door open. In less than two minutes gas fumes build to lethal concentrations in the garage.” In an attached garage, fumes can quickly spread to the house.

Probably 6 to 12 hours depending on how big the garage is and if you sealed all the gaps to prevent the exhaust gas from escaping.

If you or someone you’re with develops signs or symptoms of carbon monoxide poisoning — headache, dizziness, nausea, shortness of breath, weakness, confusion — get into fresh air immediately and call 911 or emergency medical help. Hospital staff will need critical information as soon as you arrive.