Will the car battery die if the lights are left on overnight?

[RobertLynn]

Leaving the car lights on overnight can drain the car battery. Here is relevant information: 1. Interior lights: Leaving interior lights on will consume the battery's power and affect its lifespan. However, the power consumption from interior lights is minimal and is usually replenished by the alternator while driving, so there's no need to worry too much. But leaving the headlights on will cause significant power drain, potentially depleting the battery overnight, making it impossible to start the car, and in severe cases, requiring a new battery. 2. Composition: The car's ignition system mainly consists of the battery, alternator, ignition switch, ignition coil, capacitor, distributor (breaker and distributor), spark plugs, high-voltage wires, and additional resistors. The ignition coil is composed of a primary coil (low-voltage part) and a secondary coil (high-voltage part).