Dear Sir or Madam Glad to hear that you're in the industry of lithium batteries. This is Mars from Renerge China. We specialized in manufacturing of rechargeable high energy lithium batteries for 10 years, with UL, FC, TUV, PSE, UN38.3 certified. It would be great to cooperate with you to achieve new design. Samples can be sent as per your request. Inquiry me if have any need. Your warmly reply today will be greatly appreciated. Have a great day. Mars Renerge China Email: mars@ray-cell.com