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Does Leaving Windows Open While Locking the Car Consume a Lot of Power?

1 Answers

SanSamuel

07/29/25 4:15pm

Leaving windows open while locking the car does consume power, but the amount is not significant. After the car is turned off, the power supply is not completely disconnected. For example, the anti-theft alarm and warning lights continue to operate. Additionally, many sensors in the car are powered by the battery. If the windows are left open, the car will not enter sleep mode, causing more sensors to remain active and consume additional power. Hazards of leaving windows or doors open after parking and turning off the engine: 1. Draining the battery: Before parking and turning off the engine, ensure all electrical devices are turned off. Once the engine is off, it stops generating electricity, and closing windows or other electrical devices at this point can overload the battery. Always close the doors properly when locking the car; otherwise, it will increase power consumption. In severe cases, the battery could be completely drained overnight. 2. Accelerating battery discharge: The battery naturally discharges about 1% per day. If the car is left unlocked or windows and doors are left open for an extended period after turning off the engine, it not only speeds up power consumption but also worsens the battery's discharge, affecting the car's ability to start.

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