We all know that walking is good for our health. But do you know walking can also produce electricity？A Japanese company says it has found a way to power the iPad music players just by walking.
The company is developing shoes that can produce electricity as people are walking. The shoes have a small generator （发电机） and water—filled soles （鞋底）. When people are walking，the steps make the water move fast. Then the small generator changes the power into electric power. Now the shoes can produce enough electricity to run an iPad music player if the wearer （佩戴者） keeps walking. The company predicts （预测） the shoes will be able to produce enough electricity to run a mobile phone in the future. "You will be able to power your mobile phone and talk on it if you connect the phone to your shoes and just keeping walking. " says the spokesman （发言人） of the company.
What will this kind of shoes be like？We are not sure. But one thing is sure—when we have such a pair of shoes，mobile phones are not running out of power.
