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What is the battery model of the BYD S7?

2 Answers

McBradley

07/29/25 4:24am

The original battery model of the BYD S7 is a VARTA 12V80AH maintenance-free battery. The service life of a car battery is generally 2 years, but with proper maintenance, it can last 3 to 4 years. Maintenance-free batteries require simple upkeep: check for any leakage, clean surface dirt, treat oxides on the positive and negative terminals, tighten the terminal clamps, and observe the color of the battery indicator. Below are the functions of the battery: 1. When starting the engine, the battery supplies power to the starting system, ignition system, and electronic fuel injection system. 2. When the engine is off or idling at low speed, it powers the car's electrical equipment. 3. When the generator's output is insufficient, it can assist in supplying power to the electrical equipment. 4. It mitigates voltage surges in the electrical system, protecting the car's electronic devices. 5. It stores excess electricity generated by the alternator.

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MacJosiah

08/12/25 8:08am

I've been driving the BYD S7 for a while now. The original battery usually uses the L2-400 model, which is a 12V lead-acid battery with a capacity of around 60 ampere-hours, suitable for starting the car's 1.5T engine. As the car ages, the battery tends to degrade, especially during cold winters when starting becomes difficult and the discharge rate increases. I recommend regularly checking the battery terminals for corrosion and using a multimeter to measure voltage—a fully charged battery should read above 12.6V. The model number is printed on top of the battery for easy verification. When replacing, prioritize matching the original model to avoid compatibility issues affecting onboard electronics like the dashboard. Maintenance is simple: charge the battery every six months to extend its lifespan. Maintenance-free types are more convenient but slightly more expensive. Overall, choosing the right model can save a lot of repair hassle.

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