Mobile hand-operated power sources

Mobile hand-operated power sources

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As far as i could find, there isnt a thread dedicated to dynamo hand turbines (aside from the turbine flashlights) as a means of mobile electricity. Just wondering if any of the gurus on here knew what to look for in dynamo turbines, the pros and cons over solar, what to avoid, etc... I've had my eye on a solar/dynamo powered radio/flashlight/usb power port and i dont want to buy a lemon. Cheers

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Mobile hand-operated power sources