How long is the general warranty period for car batteries?

[McIris]

Car batteries generally come with a one-year warranty. The functions of a car battery include: 1. Providing starting current to the starter when starting the engine; 2. Supplying power to in-car electrical appliances when the car's generator is not supplying power; 3. Assisting in power supply to electrical equipment when the generator's output is insufficient; 4. Storing a portion of electrical energy when the generator's terminal voltage is higher than the battery's electromotive force; 5. Protecting the car's electronic components and various electrical appliances. The maintenance methods for car batteries are: 1. Start the car regularly to charge the battery; 2. Add distilled water or a special replenishing fluid when the electrolyte is low; 3. Frequently check whether the small holes on the battery cover are ventilated during daily driving; 4. Check for signs of oxidation on the battery's positive and negative terminals; 5. Inspect all parts of the circuit for signs of aging or short circuits; 6. Turn off electrical equipment when leaving the car.