My main complaint about the product is that it's made of ABS plastic. It won't survive being run over by a car, nor do you find it waterproof. Plastic can separate if it gets crushed, and I can imagine that if somebody cranks that dynamo handle too aggressively in the wrong angle, they may well break that off, too. I would have much preferred to manufacture a product or service made of stronger materials such as aluminum alloy or even titanium. But guess what the results are to the cost? My websites: Antique Lamps - The Dragon and the Pearl