batteryless flashlight led batteries

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It gives you in the dark, but it doesn’t have the output a powered does. When you shake them you are charging a super capacitor.

There are a few different types of that can be purchased that you could have for the those times of emergency.

My wife and I have seen these advertised on television — the ones you have to shake to get to work.

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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