How to Completely Power Off a Car?

[CooperLynn]

To completely power off a car, use a wrench to disconnect the wires at both ends of the battery. Before disconnecting, wear protective goggles and gloves, and locate the positive and negative terminals of the battery, usually marked with a plus (+) and minus (-) sign. Methods to check if the battery has power include: 1. Inspect the battery's charge indicator; 2. Measure the battery's static voltage; 3. Check the battery fault light; 4. Observe if the dashboard flickers or dims when starting the car; 5. Look for signs of battery swelling, deformation, oxidation, or leakage. The functions of the battery are: 1. Powering the engine starting system, ignition system, and car electronics; 2. Supplying power to car electrical devices when the engine is off or at low idle; 3. Assisting in power supply when electrical demand exceeds the generator's capacity; 4. Acting as a voltage stabilizer for the entire electrical system, mitigating voltage spikes and protecting the car's electronic devices.