The SonoWeld 1600 digital and Dual Head metal spot welders promise quick, reliable, and cost effective assembly processes for batteries and capacitors. The SonoWeld 1600 welds multiple layers and/or delicate foils to tabs or terminals and is also suitable for assembling pouch cells. In an environmentally-friendly way, it can weld up to 20 layers of foil. In both cases, the weld is accomplished in a single operation that takes only seconds and durable bonds are created without using heat, current, fluxes, or fillers. As a result, there are no arcs, sparks or fumes produced and there is no melting of the weldment. Sonobond Ultrasonics, West Chester, PA. (800) 323-1269.