Our own-intellectual property polymer lithium ion battery employs stack technique. Its structure is multi-stack parallel connection rolling type. This technique has gained patent rights from State Intellectual Property Office of the People's Republic of China. And now we are in manufacturing stage. Various tests on our product show that it is practically superior to liquid-lithium ion battery that is now widely used in the market. It has the characteristics of high-property, light mass, long cycle life, and reliable security. All these make it the real ''green''environment-protecting product. In addition, it has more flexibility on design and structure. With its thickness of 0.5mm, it can be made in the form like credit card, so it is suitable for various kinds of mobile equipments, including note-book computer, mobile phone, digital camera, PDA, portable DVD, electrical vehicles, talkie and walkie and so on.