I'm sometimes dense and don't speak German, but even after a Babelfish translation (often amusing in themselves) I don't get the joke. Kevlar/Carbon in an attempt to be tough and light weight. 2 luxeons. Likely an overstated runtime. /ubbthreads/images/graemlins/confused.gif
Hmmh - runtime - I think he just takes 2 x 350ma = 700ma x 6h = 4.2Ah and uses 4.3Ah cells - so this *might* work out.
No mention though of the used cell chemistry (likely NiMh) and binning of the Luxeons - also no info regarding the charger (smart/dumb) - or if things are regulated or not (guess not).
Hmmh - you are right - but only in the searchstring at the very end as far as I can tell - which I have to admit I didn´t read carefully enough before.