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The UK has developed a LED gravity lamp that does not need to be charged

The day before, the British developed LED lamp (GravityLight), gravity in order to solve the problem of electricity supply in the area lack of lighting.

This is a LED light, the user simply put a heavy 20 pounds (about 9 kg) of the bag, you can let the gravity lamp continuous work for 30 minutes. It doesn't have to charge batteries or other energy, which means it doesn't cost much to work.

In addition, the lighting unit can also be used to charge other devices, such as a radio or a rechargeable battery. The user can adjust the brightness of the gravity lamp according to the need to extend the lighting time correspondingly.

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