OPTIMUM BATTERY CO., LTD was found in Shenzhen China in 2001. We are one of the biggest and leading battery manufactures in China with over 1000 employees in our 50,000 square meters facility. We manufacture rechargeable battery including LiFePO4, Ni-Zn, Ni-CD, Ni-MH etc in different sizes.And used in lawn light,solar energy light,emergency lighting products,electrical power tools,electrical vehicle,electrical mosquito swatter and all kinds of battery operated toys. We achieved TUV ISO 9001, ISO 14000, UL, CE, RBRC certification.