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I know how it works.
- Shake the flashlight. This wil move a magnet inside a coil wich produces power.
- The power is stored inside a capacitor.
- When the capasitor is fully loaded you can use it for a fw minutes.
The second design was used decades ago. It's a good one.
For both flaslights the is a disadvantage. When you don't use it once every month the capacitor can break down.
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