That was a wag on the part of Peter White, probably some bad schnapps or something. A minute on a 5 mile commute would mean pretty significant, noticeable drag. We all know that dynohubs have drag, but I really feel that it's in the noise level. I out-coast all the people I ride with except the recumbent riders. And furthermore, this is the long distance forum after all, this is where the multi-day riders are. It's possible to ride multi-day events with batteries, but if you ride as slow as I do a spare battery would be in order.