Ltd established in 1985, have about 25 years history. Now it have two companies in china mainland (1) Serene electronic factory , which mainly in produce and sell the water power clock ,water power calculator and keyboard abroad; (2) Dongguan Xieneng electronic Co., Ltd , which as the sells company mainly in sell our product in China and Asia. As the marketing increase, the company get larger develop. In the year of 1987 the company have bought the new workshop and invested more money in it; 1990 have started to research the water power battery, got success and patent in 1992 ; 1995 opened Serene electronic factory in Changan town, Dongguan city; 2003 past the ISO 9001 Version2000 certificate. We are depend on the better service and good quality have got the "Green Partner" of Sony in the same year; 2005-2007 get the water battery patent in Germany, Japan, USA, UK and so on.;in 2008 open Dongguan Xieneng electronic Co., Ltd. As the 20 years developing, the company having many high precision automatic machine, and training many professional engineer and works. At present, the company as the patent of water battery for the core---doing the water power clock , water power calculator and other new product research. Now our product have sell in Europe, USA and so on. Our company use " Protection environment and zero defect" as our target, as the quality of our life, continue to improve, supply the best service and good quality for all the customer, welcome the different countries customer to cooperation with us .