batteryless flashlight led torch

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Actually i am making an app in android and i want to turn on without opening camera so is it possible to make such an app???

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

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

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

How Faraday Flashlights Work

How to turn on/off camera LED / flashlight in Android – Mkyong

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