The car charger is the charger that can be charged in the car, 40 watts of indicating that his charging power is 40 watts, 66 watts of indicating that his charging power is 66 watts.
If it is 4500mah, the variable is unique, the time difference is not big, and there is no need to charge to 100%. If 40w is 4200mah and 66w is 4500mah, although there is little difference in time, the efficiency of 66w is still quite large