Battery as the core component of the electric bicycle, not only occupies a quarter of  electric bicycle battery cost of the electric car, but it is also a consumable. 2-3 years to change a group of commonly used electric bicycle battery price, according to the different battery types, models to assess the words, its price is about 300-2000 yuan. It is also a considerable amount of money, then, the cost of a group of electric car battery about how much money? How much money can a busin…