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On the bus or on the subway, inertia is often annoying .Because when a vehicle start or brake will make people be back or forward.
Storing the generation gravity power of people pulling the bracelet ,To provide and supply electric power to the car and add a screen in the bracelet , show the time and next station through the collecting energy from the pulling , the collecting energy also can charge the cellphone , even can be a hand warmer to the passenger in the winter.
Guangdong University of technology
Guangzhou, China
Zijun Zhao,
Guangdong University of technology
Hailong Ye,
Guangdong University of Technology
Xusheng Chen,
Guangdong University of Technology
Huimin Zhong,
Guangdong University of Technology
