Shenzhen Desay Battery Technology Co., Ltd. (000049.SZ) engages in the research, development, design, production, and sale of lithium battery power management systems, energy storage cells, and related integrated packaging products. The company offers small- and medium-sized lithium battery power management systems and packaging integration for consumer electronics such as smart phones and wearables; power tools including vacuum cleaners; large-scale energy storage solutions encompassing lithium iron phosphate (LiFePO4) battery cells (100Ah, 280Ah, 314Ah), sodium cells (60Ah), modular battery systems, integrated storage cabinets (215kWh to 344kWh), 5MWh liquid-cooled containerized systems, UPS cabinets, household storage systems, and data center energy integration solutions; as well as battery leasing and system-in-package services. Founded in 1985 and headquartered in Shenzhen, China, the company operates primarily in China with international reach through manufacturing bases abroad, including Vietnam, and serves consumer electronics manufacturers, power tool makers, automotive firms, and energy storage customers in domestic and overseas markets; it maintains subsidiaries such as Huizhou Desay Battery Co., Ltd., Huizhou Lanyi Microelectronics Co., Ltd., Guangdong Desay Silicon Peng Technology Co., Ltd., and Hunan Desay Battery Co., Ltd. Recent developments include a July 2024 partnership with Victory Giant Technology to supply LiFePO4 battery storage cabinets and control systems for China's largest user-side energy storage station (121MW/630MWh) in Huizhou; a September 2025 strategic collaboration with Shenzhen Hello Tech Energy for portable and mobile household energy storage; the July 2025 mass production launch of proactive safety-focused battery cells, systems, UPS 2.0, and source-grid-load-storage solutions for data centers; inclusion on BloombergNEF's Q4 2025 Global Energy Storage Tier 1 List; and a planned RMB 3 billion investment over three years in production capacity and next-generation battery technologies, alongside 20% capacity expansion targeting EV batteries.