Battery Pack Building(aka. Value-added pack building) This service uses an electrode welder that produces very high voltage at a very low amperage to weld battery connectors together into a variety of battery packs. From ''dust busters'' to hand held power tools, our service of welding battery packs to match your device's voltage, amperage draw, and chemistry is what we do. Whether it's a one-of-a-kind battery that you need remade to fit your existing device or multiple battery packs for door locks or medical devices, we are happy to give you an estimate for any project.