Provided is a receptacle connector for a battery in a mobile electric device, which includes a contact terminal, a connection terminal, and an extension portion. The contact terminal electrically contacts a plug connector of the mobile electric device; the connection terminal is fit and soldered in a through hole of a battery PCB, and is integrally formed with the contact terminal; The extension portion is bent and extends from a front end of the connection terminal to form a solder receiving space for receiving solder flowing through the through hole of the PCB together with the connection terminal while a soldering operation is performed on the connection terminal; the extension portion together with the connection terminal is fit and soldered in the through hole of the PCB. Consequently, the soldering tin raising amount can be minimized while tin soldering on a battery tellite, and the tellite is protected.