The BS-2-1 electronic part is a Battery Holders, Clips & Contacts DIP RoHS component manufactured by Q&J. It is designed to reliably hold and make contact between two pieces of equipment containing power sources, such as battery cells, while simultaneously protecting the connection from dust, moisture, and other environmental factors. The BS-2-1 is RoHS (Restriction of Hazardous Substances) compliant, meaning that lead, mercury, and other hazardous substances used in its production have been eliminated. It is made for dual in-line packages (DIP) and contains two types of clips, one for 2 A and one for 1 A batteries.