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Old 20-05-2009, 04:26 PM
rvirga rvirga is offline
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Join Date: Dec 2008
Location: Milano, Italy
Posts: 256
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most bicycles here have a dynamo-powered front lamp for driving after dark, and they always had since I was a little kid, so I would say for at least 30 years. It's just a simple matter of adding a switch allowing to select whether to send the power to the lamp or to a battery, and to leave the dynamo on during daylight, allowing it to charge the battery. I would be very surprised if no bike manufacturer hasn't implemented this already, but, even if no one has, it's a really straightforward modification you can do yourself.