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Does turning off the engine with the car air conditioner still on cause battery drain?

1 Answers

KylieLee

07/30/25 3:44am

Turning off the engine with the car air conditioner still on does not cause battery drain. Here is a detailed explanation about car battery consumption: 1. Engine shutdown: Shutdown is also known as extinguishing. When the reactor is operating at a significant reaction rate, if the temperature of the feed inlet is reduced to reach the lower limit of the multiple state region, the reaction rate will suddenly drop significantly, and the reaction basically stops. After shutdown, the ignition switch is in the off state and will not cause battery drain. 2. Car battery: The battery is an essential part of a car and can be divided into traditional lead-acid batteries and maintenance-free batteries. Since the battery uses a lead-calcium alloy as the grid frame, the amount of water decomposition during charging is small, and the amount of water evaporation is also low. In addition, the sealed structure of the outer shell releases very little sulfuric acid gas. Therefore, compared with traditional batteries, it has the advantages of not needing to add any liquid, connecting to the terminal, and long power storage time.

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