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Faraday induction ('those shake-to-charge flash lights') mobile phone/device charger Answered

Need help using charging mechanism of shake flashlight (faradays law of induction) to charge mobile or usb devices.


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9 years ago

I have one of those flashlights. It takes a whole lot of shaking to charge up the coin cells to get about a minute or less of light. I don't know what the power requirements are to do a trickle charge but it will be a lot of effort to do unless the shaking is done by machine or hooked up to something. I do remember seeing something that you can throw in your backpack and walk around while it charges a mobile device. Good luck.