Abstract: A wireless battery snap without any leading out electrical wires and which has at least one button with exposed metal for use in an electrical device for connecting the battery which is safer in use. The spring comprises an insulating support, conductive eyelets, cylindrical socket and plug electrode, spring, contact plate, insulating sheet and insulating cover. At least two electrode holes and protruded base, posts and side walls are provided in the insulating support for securing the contact plate, spring, conductive eyelets and insulating cover. The socket and plug electrodes are held by two conductive eyelets on the insulating support and fastened together with the spring and contact plate. Two button electrodes of the battery disposed on the socket and plug electrodes respectively are connected to the contact plate on the insulating support and spring or two contact poles.