Over 16 years, we are specialized in design, manufacture and sell mobile phone related accessories, external portable batteries and any of the new advanced technology battery products. For years later, we go into the top science & technology battery scope. So we would like to keep you informed the latest battery product information. We keep good and long term relationship with our old friends worldwide. At the same time, we hope to work with you and benefit both from our near future cooperation. So, on your concern of any battery inquiry, please feel free to contact me directly.