电动滑板车怎的?

        早在1916年，德国就研发出了电动滑板车，售价昂贵，美国不少邮差使用这种电动滑板车送信，很多人作为代步工具。后来，低廉燃油的摩托车取代了这个昙花一现的电动产品。一个世纪前的电动滑板车甚至比现在的显得外观完美、机械可靠、工艺先进，是电动产品没长进还是当时已超越了时代发展?100年来电化学电池蓄能水平从没有进展是其中原因之一。    Early in 1916, Germany had  developed the electric scooter which price was expensive. Many postmen used the electric scooters to send postletters for Post Office in USA. A lot of people transport by it. In the end, low-cost fuel oil motor replace the electric product like briefly epiphyllum. A century ago, electric  scooter had even more perfect appearance, mechanical reliability and advanced process. If those electric products had been  ahead of its time or it's no progress up to now? During 100 years, it maybe one of the reasons those chemistry batteries had had  no  any progress at the level of Electrochemical Cell Energy Storage.

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