Charge (or electric vehicles to a certain number of times to a certain degree) fixed number of year would certainly are faced with the problem battery performance attenuation, mainly manifested in capacitance decrease, which directly affect the vehicle range Many consumers to worry about, if out of the warranty period, the efficiency of the battery down, can replace a new battery? How to calculate cost again?At present, the sales of electric vehicles on the market, some warranty for 5 years, 100000 kilometers, a few hit six years 150000 kilometers.