Nickel metal hydride battery have obvious advantages and disadvantages, but the products are mature and stable and are still widely used. Nickel-metal hydride battery is a new type of green battery developed in the 1990s. It has the characteristics of high energy, long life and no pollution,. China's production of nickel metal hydride battery exceeded 1.3 billion in 2006, replacing Japan as the world's largest producer. So far, the. In the early days, nickel metal hydride battery were used to replace nickel-cadmium batteries in the aerospace field, especially satellites, and began to expand to the civilian market in the 1980s. Up to now, in the civilian field, nickel metal hydride battery are. Different hybrid configuration batteries have different needs, but they all pursue safety, high rate, and long life. Nickel-metal hydride, ternary, and lithium iron phosphate will.