We are a world-wide SLA battery and OPZV battery manufacturer in China and Vietnam, the first and only one battery public company in US Nasdaq. Market(Code: CRTP) from China. We have more than 2000 staffs and factories in Shenzhen, Hengyang and Vietnam. We obtained ISO18001, CE, UL certificates to make our factory running in good order and good quality control. Our QC people also make 100% test before the shipment and control the quality very well. We also make plates by ourselves to make sure good quality and low cost. We can supply you best quality, our chief engineer, professor Mr He Degong, who is number 1 in battery technology in China, has more than forty years experience in battery field, and all our batteries designed by him. actually our batteries are already bought to US aviation and spaceflight department by one of our America customers since 8 years ago.