Sweet. I've been following the development of the Lithium Sulfur batteries since first hearing about them last year. If they or something similar work out for hobby use, our power to weight ratios will step up to a whole other level. It will probably be the final blow to glow engines on anything but niche nostalgia type projects. It will also completely open up pattern planes to be lighter and have better endurance for the longer sequences. And don't get me started on all kinds of racing...