We'd love to hear from you!Shenzhen Starmax Energy Technology Co., Ltd is specialized in rechargeable battery for over 10 years. All of our batteries passed UL CE, ROHS, CB and IEC62133 certification. Our professionalengineers are waiting here to assist you with your application needs. Please feel free to contact us by phone oremail to discuss more details. There is a quick contact form below. If you want Request a Ouote for expansion joint, please fill out the second form as complete as you could. A Starmax Energy associate will respond as soon as possible.Shenzhen Starmax Energy Technology Co., LtdFactory Add:Building 11-12, Henglongji Industrial Park, Xinxu Town, Huiyang District, Huizhou City, Guangdong Province,516223Tel:+86 13826591407Email:support@szxhbattery.com