A shake flashlight has a fixed coil of wire, usually in the handle (see Photo 2), and a moveable magnet that passes through the coil. By shaking the flashlight back and forth, the magnet passes ...

Some devices are elaborately made to appear as if they operate on Faraday’s Law, when in fact the components have as much functionality as a pet rock All the rage a few years back, shake-to-charge ...

The flashlight box clearly stated in poor, but understandable English, that the flashlight did NOT use batteries, all you had to do to make it light was to shake it back and forth. On my way out I ...

Shake Flashlight makes you jiggle your phone to turn on the flashlight, which cuts out manual processes. With over one million downloads, it's been a popular option since 2015 among Android ...

Hold the flashlight horizontally and shake it so the magnet moves through the coil. Shine the light at the audience. Original construction: purchased. The flashlight has had its capacitor and on/off ...

It was a flashlight that never needed batteries. With a small white LED, a few coils wrapped around a tube, and a magnet, you could just shake this flashlight to charge it.

After about 50 hours, the flashlight was more like a night light. And at 60 hours, there was no shine at all. Still, it turned right back on when we dipped the fuel cell in water again.

Are there any real magnetic induction shake-to-charge flashlights out there? Phil Karras relates his run-in with some more flagrant fakes on his website: “I’m not saying that the flashlights were not ...