The charger delivered with the Huawei p20 is 5V\/2A, 4.5V\/5A, or 5V\/4.5A, and supports fast charge. Huawei p20 is standard 5V\/4.5A compatible with 4.5V\/5A, supports the maximum output current 1A\/5V in OTG reverse power supply, and supports super fast charge 5V\/4.5A.