Founded in 2005 ,Tianjin Saiyingsi Battery Co.Ltd. is one of the biggest manufacturers of high temperature lithium batteries in China .We are mainly engaged in the production ,research and development of technical lithium batteries that is widely used in down hole oil and gas . We apply the progressive technological programmes,specialize in manufacturing high quality MWD/LWD high temperature Lisocl2 batteries . Our batteries advantages lie in the stable performance and safety and they could bear different harsh environments . What’s more , to satisfy the customer’s different requirements , we could manufacture the special lithium batteries.