SunStone Power Industry Co., Ltd is ranked as one of the biggest manufacturers and exporters of Valve Lead-Acid Battery and Ni-Cd battery in China after more than 14 years hard working. With its production facility of 70,Website:http://www.deepcyclesolarbattery.com,000 square meters and 350 employees, \"SunStone\" is the most competitive brand from China to worldwide. Presently, SunStone is composed of three factories. First of all, the Battery Plate Making Factory is located in Yunnan province which is one of the main lead production area in China.