How Long Can a Car Battery Last Without Use?

[Tom]

Theoretically speaking, a car can be left unused for up to two months without affecting the normal operation of the battery. When not in use, it is best to disconnect the positive and negative terminals of the battery to prevent natural discharge. Methods to extend battery life: 1. Frequent use of the battery: Most cars use lead-acid batteries. If the car is not operated for a long time, the sulfuric acid inside will settle, leading to natural discharge. Prolonged occurrences of this situation will result in insufficient power supply and significantly reduce the battery's lifespan. 2. Pay attention to cleaning the battery terminals: Since the area around the terminals is not completely sealed, when the car is in operation, any movement can cause the electrolyte to leak out from the terminals. This electrolyte can undergo chemical reactions in the air, affecting the normal operation of the battery. 3. Regularly check the alternator: The battery relies on the alternator for charging. If the alternator malfunctions, the battery will be greatly affected, not only causing insufficient power supply but also continuously depleting the battery's durability. Therefore, special attention must be paid to the alternator as the primary source.