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2 Strings of 7.4V Continuous 3A Lithium Battery Protection Board 2 Strings of Protection Board 7.4V Protection Board, Find Details and Price about 7.4V Protection Board 2 Strings of 7.4V Continuous 3A from 2 Strings of 7.4V Continuous 3A Lithium Battery Protection Board 2 Strings of Protection Board 7.4V Protection Board - Shenzhen Dragon Beauty Optoelectronic Co., Ltd.