How to Properly Disconnect a Car's Power?

1 Answers
McAlyssa
07/29/25 6:11pm
To disconnect the power, simply use a wrench to remove the wires at both ends of the battery. Disconnecting the battery is not beneficial for the car. If the car is used infrequently, disconnecting the battery will reset the engine computer's injection data, and other onboard computer data may also be cleared. This can negatively impact future vehicle usage, such as worsening fuel consumption and acceleration performance. Frequent electrical pulses may also damage the chips and precision sensors of various onboard computers or devices. A simpler solution is to regularly (once a month) charge the battery with a charger. The best practice is to drive the car more after starting it, as batteries are particularly vulnerable to low temperatures. In cold environments, a battery's capacity is significantly lower than at normal temperatures. We should promptly inspect and maintain the battery. In daily life, pay attention to the following: 1. Avoid parking the car in open parking lots for extended periods. If long-term parking is necessary, remove the battery to prevent freezing damage. 2. In winter, car engines are harder to start. Each attempt to start the engine should not exceed 5 seconds, with at least 15 seconds between attempts. If the engine fails to start after several tries, check other aspects such as the electrical circuit, ignition coil, or fuel system. Avoid continuous attempts to start the engine, as this can over-discharge and damage the battery. 3. Regularly charge the car battery. A battery left unused will gradually discharge on its own until it becomes unusable. Therefore, start the car periodically to recharge the battery. 4. Clean the battery terminals regularly and apply specialized grease to protect the wiring harness. Frequently inspect the battery's accessories and connecting wires. 5. Avoid using car electronics after turning off the engine. Using the battery alone when the engine is not generating power can cause damage.
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