Lithium ion polymer batteries are characterized by their high energy density, customized appearance, small size, light weight, good safety, and flexible design. They are widely used in wearable products, smart phones, power bank, laptops, and tablets, etc. Our battery products cover 4.2V, 4.35V, 4.4V voltage system, the maximum capacity density can reach 720Wh/L so far, remaining capacity can reach more than 80% after 1500 cycles.