The best charging capacity is in the range of 20%~90%. Charging the power in this interval can reduce the impact of charging on the power battery and effectively extend the service life of the power battery. The related introduction is as follows: pure electric vehicle: it will be charged when the power consumption is about 40%, but pure electric vehicle is not. This is because the battery material of electric vehicles is generally lead-acid batteries, and frequent use of electricity can easily lead to battery vulcanization, decreased power storage capacity and shortened battery life. Smaller capacity: most manufacturers still recommend that the car be charged with about 20% remaining power. On the one hand, it can ensure that the car can drive safely to the nearby charging station; On the other hand, high-frequency charging will also bring some minor damage to the battery, and often not fully charged will reduce the battery capacity.