Power from Gravity
Gravity batteries utilize the principle of converting kinetic energy into potential energy for energy storage. A demonstration model has been created that achieves a peak output of 13 W with 58% efficiency, although it is not practical for everyday use. The system is built using a bicycle chain and sprockets, and costs about $400 to construct.
- ▪Gravity batteries store energy by lifting a heavy mass and converting it back to electricity when it falls.
- ▪The demonstration model has a height of 1.8 meters and a mass of 15.65 kg.
- ▪It takes 394 drops of the weight to fully charge an iPhone 16, indicating limited practicality.
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Power From Gravity No comments by: Al Williams May 26, 2026 Title: Copy Short Link: Copy Gravity batteries aren’t exactly a new idea. You can store energy by lifting something heavy, converting kinetic energy into potential energy. To get it back, you let the mass fall and convert that motion to electricity. [Valeriamayara22] shows how to build a working demonstration model of such a system. This isn’t free energy. Something has to lift the weight. In this case, the height is 1.8 meters, and the mass is 15.65 kg. Even so, the model achieves 13 W peak output and 58% efficiency, according to the post. Reportedly, it takes 394 drops of the weight to fully charge an iPhone 16, so this isn’t a practical project, but it does show how a gravity battery works.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Hackaday.
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