The car battery is the core energy storage component of a vehicle. It is responsible for providing instantaneous high-voltage current for starting the engine, as well as powering electrical equipment such as lights, audio, and air conditioning inside the vehicle, and maintaining the normal operation of the vehicle's electrical system when the engine is not running.

A battery's lifespan is typically 3-5 years. When issues such as weak starting, dim lights, or the battery warning light illuminate, it needs to be inspected and replaced promptly. When selecting a battery, it's essential to match the vehicle's rated voltage and capacity. Prioritize maintenance-free batteries, as they offer better sealing, lower maintenance costs, and provide stable and reliable starting power, preventing breakdowns due to battery failure.

High-quality spark plugs need to be resistant to high temperatures and corrosion, and have strong ignition energy. The lifespan of spark plugs made of different materials (nickel alloy, platinum, iridium) varies significantly: nickel alloy spark plugs have a lifespan of about 20,000 to 30,000 kilometers, platinum spark plugs about 60,000 to 80,000 kilometers, and iridium spark plugs can reach more than 100,000 kilometers.