What are the retirement standards for BYD K9 city bus power batteries? Service life? Mileage? Number of charge and discharge times?

BYD: Hello! In order to promote energy conservation and emission reduction in cities and build modern livable cities, BYD has formulated practical electrification solutions and launched pure electric commercial vehicle products, achieving full market coverage in 10 fields including urban public transportation, taxis, road passenger transportation, urban commodity logistics, urban building logistics, urban sanitation, as well as warehousing, ports, airports, and mines. The company has many products and its parameters cannot be responded to online one by one. Please visit the company's official website for details or call the relevant hotline. Thank you for your attention to the company!