In the development of electric vehicles during the general use of 150W-180W motor 12AH battery during this period the battery life can reach 2-3 years without increasing the customer to mention the speed of the slow motor to 350W-500W and the battery changed to 17AH-20AH battery The use of the package in the 6-10 months there are manufacturers using 700W motor to prove that the motor output power and battery life only to reduce the cost of proof is not perfect.