Agreed. The iPad Air 4 supports fast charging up to 20W, but it is also compatible with low-power chargers, including 5W and 12W chargers, so a 66W charger can be safely used to charge the iPad Air 4. However, because the charger power is too large, it may cause the charging speed to be too fast, which may have a certain impact on the battery life after a long time of use. Therefore, it is best to use a charger that matches the device when charging to ensure the best balance of charging effect and battery life.