Coslight Technology International Group Limited, an investment holding company, manufactures and sells battery products in the People's Republic of China, Japan, Korea, India, South Africa, Vietnam, and internationally. It offers valve-regulated lead-acid batteries for use in telecommunication fields; square liquid lithium batteries for use as fittings of the cell phone; polymer li-ion batteries for use in MP3, mobile phones, Bluetooth headsets, and other small electronic products; and lithium iron phosphate batteries for use in electric bicycles and vehicles, and back-up power. The company also provides Ni-MH batteries for use in cordless telephones, stationary business telephones and walkie-talkie phone razors, radios, and tape recorders; and DC power supplies, such as high-frequency switching power supply systems, DC power supply systems for telecommunication, and charge and intellectual protection and control systems for electric bicycle-based lithium iron phosphate batteries. In addition, it offers base station and tower mounted amplifiers, master and salve trunk amplifiers, wireless and fiber-optic repeaters, and frequency shift repeaters for wireless communication applications. Further, the company provides power automation systems, including substation automation systems, integrated automation systems for electrical power plants, and computer monitoring systems for hydropower stations; and over-voltage protection circuits for use in communication systems, over-voltage protection of power systems, chips protection for lithium batteries, etc. Additionally, it offers online game services; manufactures and sells signal strength systems, electric and automation systems, motor vehicles, pharmaceutical products, high and low voltage switches, automobile batteries, and passenger coaches; and trades in sealed lead acid batteries. Coslight Technology International Group Limited was founded in 1994 and is headquartered in Central, Hong Kong.