In the continuing (and welcome) price battle between energy giants, E.ON made the most recent move by relaunching its Fix Online tariff. The new version 3 is cheaper than its predecessors and in some cases the cheapest overall. Among the dominant features of this offer is a fixed price guarantee until December 2010, coupled with Tesco Clubcard points. Not surprisingly, E.ON stresses that this offer will be available for a short time only.