Convenience shops are everywhere, and they sell the great majority of gasoline consumed by Americans. However, as more Americans switch to electric vehicles, one of the main reasons people shop at convenience stores may vanish.

Charging time is mostly determined by the capacity, power density, and charging power of the battery. The bigger the battery's capacity, the more charge it can store (analogous to the fuel tank size). The battery can accept more charge/unit time with a higher power density (the size of the tank opening). Higher charging power provides more energy per unit time (similar to the flow rate of a pump).

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