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Energy stone is a kind of portable power energized by swinging. Our whole body is in "a status of motion" when we are in a walking tour or wilderness exploration. So as long as energy stone is tied on knapsack and connected to a mobile phone, we can charge the mobile phone while walking. With compacted shape hanging on knapsack and without any weight - bearing, it is just like ornament on knapsack.
Guangzhou academy of fine arts
Guangzhou city, guangdong province, China
Yong ping Jin,
Guangzhou academy of fine arts
Shao bin Wang,
Guangzhou academy of fine arts
