Here is a tiny mechanical charger that lets you produce power for your smartphone on the go. Jiffy fits in your pocket and lets you charge your smartphone when you don’t have access to other power sources. Jiffy can charge multiple smartphones as long as you keep rotating its handle.
More gadgets like this: here
Jiffy- The charger that keeps on giving
Jiffy works day and night and can charge iOS and Android phones. You can even use it as a light source. More information is available on Indiegogo.
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