BYD Co Ltd (BYD) is a rechargeable battery manufacturer for industries related to electronics, automobiles, new energy and rail transit. The company manufactures new energy vehicles, handset components, assembly services, rechargeable batteries, and photovoltaic cells. Its energy storage batteries find applications in powerside energy storage, power grid energy storage, industrial and commercial energy storage and household energy storage. It provides materials development and product design, conducts research and development, and offers parts and components and complete machine manufacturing, supply chain management, logistics, and after-sales services to the customers. It also produces smartphones, tablet computers, smart home devices, game hardware, drones, AI servers, 3D printers, Internet of Things, robots, communication equipment, and medical and health equipment.

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BYD has undertaken significant R&D initiatives, focusing on core technological innovation in sectors such as NEVs, batteries, and electronics. The company is guided by its Three Green Visions of solar energy, energy storage, and electric vehicles. It has built an R&D system with over 120,000 engineers, more than 71,000 patent applications, and over 42,000 granted patents. The development of the BYD SkyRail, with an investment of RMB 5 billion, exemplifies the company's commitment to innovation, resulting in proprietary intellectual property rights to a complete monorail system. In FY2025, the company incurred expenses of CNY57,978.1 million on R&D, which as a percentage of revenue, stood at 6.5%.