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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.