Quantums new Qpaq-X, a high-energy portable power supply for the Qflash model X & X2, is a professional-quality system that lets the user select from 200 to 800 ws of flash power by combining snap-together capacitor & battery modules. In addition to keeping size & weight down by using only the components needed, this intelligent design offers a choice of two battery sizes, normal & fast recycling, individual control of two flash heads, as well as operation from US & overseas AC sources.