Please contact us immediately once you have found the imperfections of large supercapacitor. If you have received our second-best product,we will arrange professional staff to verify it. Return of goods or exchanging goods service is provided for you. Before shipment, we will conduct strict test on each product to ensure the quality of product. We pay close attention to the sales service, which can solve problems including handling imperfections of the goods.

Shanghai Green Tech Co.,Ltd. is a leading graphene battery company with an edge in innovation. Shanghai Green Tech is mainly engaged in the business of super capacitor module and other product series. GTCAP super capacitor module has an appearance design that follows the market trend. The product does not contain lead or mercury, no UV or IR radiation, which is safe for home and the environment and helps users save much energy costs.

We make a clear promise: To make our customers more successful. We regard every customer as our partner with their specific needs determining our products and services.