Spring Battery Connector 1)Material:Steel 2)Plated:Nickel, Tin, Zinc,Silver, Gold,etc 3)Professional service 4)Hight quality Description of our Spring Battery Connector With Zinc Plated: 1)Applicaton:Connecting with USB of computers, mobile phones and other electronic product. 2)Offer OEM and ODM service 3)Material:Regular metal like copper, brass, aluminum ,stainless steel, cupronickel, bronze, ...