Memory Protection Devices, Inc. MPD is an ISO 9001 certified global manufacturer of battery holders, battery contacts, auto plugs, auto sockets, fuse holders, DC jacks, DC plugs, and other electronic components and devices. Our parts are manufactured to rigorous standards in factories located around the world, which meet not only our quality requirements, but our social ones as well. We believe that many components have not been given as much thought as they deserve, and every day we work to fin