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. With the advancement of modern technology in the last few years there have been many that have been made that are wonderful for all your emergency preparedness needs.

A that uses the Faraday Principle has copper coils that are passed through a magnetic field when you shake the . The resulting electricity is harnessed in order to the .

My present invention relates to and more particularly to which are operated by spring motors. In my present invention, I have designed a having an intermittent main drive.

Hydra- is a that is powered by water, rather than requiring battery power. This is inexpensive, and its versatility makes it easy to use this device at any time. What is HydraLight?

https://en.wikipedia.org/wiki/Batteryless_radio

https://en.wikipedia.org/wiki/Batteryless_switch

https://en.wikipedia.org/wiki/Battery_leasing

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