Optimum are one of the top LiFePO4 battery manufacture in China, now majored in five economically feasible fields of new energy, such as vehicles (automobiles), energy storage(grid, wind-solar generating system and load shifting),UPS, military products and household appliances. We accredited with Ul, CE, ISO 9001:2008, etc. And own a proficient team that sucessfully tackle with most of the application request, we are good at face customers' special demand, we product green power energy. Hope cooprate with you1