Originally Posted by
rifraf
Bottle dynamos arent really comparable with dynamo hubs.
My memory of riding with a bottle dynamo "on" is it was like riding with the brakes on and not fun.
I can't tell the difference between on and off with a dynamo hub which are for all intents and purposes "drag free".
Even with very bad running bottle dynamo's you can feel the difference between powering a light and just have it rotate with the cables disconnected. I don't have much experience with hub dynamo's but there's no such thing as free current. But a led takes much less energy so it's getting difficult to feel the difference. It's also the vulnerability of the connection in bike racks and stuff like that why I like the battery and the light inside one unit.