Abstract: A battery holder which allows the battery to be installed or removed easily and accurately has a fulcrum that is convex upward formed near the center portion of the bottom surface of the battery holder base. A battery mounting frame has a retainer to immobilize one side of the battery and a frame that secures an electrode and the battery has a retainer and a removing flange to immobilize the other side of the battery. To install the battery, one side of the battery is forced against the spring force of the negative contact while the other side of the battery is inserted between the bottom surface and the retainer. The battery rotates around the fulcrum and is installed in the battery container by a single touch of a finger. As the removing flange is pressed, the installed battery rotates around the fulcrum to allow one side of the battery to escape from the battery container, and ride over the retainer toward the upper side, to allow the battery to be lifted out.

Abstract: A method of assembling a shielded circuit of electronic components and loading them directly into a shell without arranging electronic components on a board. A hybridized electronic circuit, for example a rectifier circuit is made with a bottom shell formed from a transparent plastic, into which is loaded an electronic part. The bottom shell has a connector section as well as a slot which joins the terminals of the electronic components to a top shell also formed from the same plastic, and the various electronic components; the slots in the bottom shell is such that after the electronic component terminals are intersected they can be positioned; then after the electronic components are loaded, the top shell is placed as a cover, and the intersecting terminals as well as the electronic components are ultrasonically sealed at the same time.