This is two different concepts, one is the charging power, the other is the charging current, the charging power is equal to the charging voltage x charging current. If the charger is exactly 12 volts 10a, then it is exactly 120w of charging power. Today's fast charging appliances are intelligent, and generally have several charging gears. There are also different charger methods with different charging voltages and currents, and there are high voltage and low current chargers, such as Qualcomm's charging scheme. There are also low voltage and high current chargers, such as oppo's charging scheme.